The volume of a cylinder is given by the formula V = πr²h, where r is the radius and h is the height. Since the diameter of the rod is 8 cm, the radius is 4 cm.
The given rod has a circular cross-section with a radius of 4 centimeters and a length of 30 centimeters. The volume of this rod can be calculated using the formula for the volume of a cylinder, which is V = πr²h, where r is the radius of the circular base and h is the height or length of the cylinder.
Substituting the given values into the formula, we get:
V = π(4²)(30)
Simplifying the expression, we get:
V = 480π cubic centimeters
This is the volume of one rod. To find the total amount of steel needed to make 113 rods, we simply multiply the volume of one rod by 113, since all rods are of the same size and shape.
total steel needed = 113 × V
total steel needed = 113 × 480π cubic centimeters
total steel needed = 54,240π cubic centimeters
Therefore, the total amount of steel needed to make 113 rods is 54,240π cubic centimeters.
To know more about volume,
https://brainly.com/question/12237641
#SPJ11
let a be a finite set. let s be the set of all subsets of a. then |s| = 2|a| . (the set s is called the power set of a
A finite set is a set that has a specific number of elements (as opposed to an infinite set, which has an infinite number of elements).
A subset is a set that contains some (or all) of the elements of another set. For example, if A = {1, 2, 3, 4}, then {1, 2} is a subset of A.
The power set of a set is the set of all subsets of that set. So, if A = {1, 2, 3}, then the power set of A is the set { {}, {1}, {2}, {3}, {1,2}, {1,3}, {2,3}, {1,2,3} }, which contains all possible combinations of the elements of A. Note that the power set always includes the empty set and the set itself.
Now, let's prove the statement |s| = 2|a|.
To do this, we need to show that the number of elements in s (the power set of a) is equal to 2 to the power of the number of elements in a.
First, let's think about how many subsets a finite set with n elements has.
For each element in the set, there are two choices: include it in a particular subset, or don't include it. So, for one element, there are 2 choices. For two elements, there are 2 x 2 = 4 choices. For three elements, there are 2 x 2 x 2 = 8 choices. In general, for a set with n elements, there are 2 x 2 x ... x 2 (n times) = 2^n choices.
Therefore, the power set of a set with n elements has 2^n elements.
So, in our case, if a is a finite set with |a| elements, then the power set of a (s) has 2^|a| elements.
Therefore, |s| = 2^|a|, which proves that |s| = 2|a|.
I hope that helps! Let me know if you have any other questions.
Hi! The given statement is true. If 'a' is a finite set, then 's' is the set of all subsets of 'a', also known as the power set of 'a'. The cardinality (or size) of the power set, denoted by |s|, is equal to 2 raised to the power of the size of the finite set 'a', i.e., |s| = 2^|a|.
Visit here to learn more about finite set brainly.com/question/31212187
#SPJ11
O is the center of the regular octagon below. Find its area. Round to the nearest tenth if necessary.
[tex]\underset{ \textit{angle in degrees} }{\textit{area of a regular polygon}}\\\\ A=\cfrac{nR^2}{2}\cdot \sin\left( \frac{360}{n} \right) ~~ \begin{cases} n=sides\\ R=\stackrel{\textit{radius of}}{circumcircle}\\[-0.5em] \hrulefill\\ n=8\\ a=17 \end{cases}\implies A=\cfrac{(8)(6)^2}{2}\cdot \sin\left( \frac{360}{8} \right) \\\\\\ A=144\sin(45^o)\implies A\approx 101.8[/tex]
Make sure your calculator is in Degree mode.
Bianca substitutes a value for X in the equation 4x=2x+6, How will Bianca know if the value is a solution of the equation?
Answer: 3
Step-by-step explanation:
4x=2x+6
4x-2x=6
2x=6
x=6/2
x=3
Use PMI to prove that 22n+1 +7 is a multiple of 3 for n≥1.
Therefore, by PMI, we can conclude that 22n+1 +7 is a multiple of 3 for n≥1.
what is multiple ?
In mathematics, a multiple is a product of an integer and any other integer. In other words, if a and b are integers, and there exists an integer c such that a = b x c, then a is a multiple of b, and we say that b divides a (or that b is a divisor or factor of a).
In the given question,
To prove that 22n+1 + 7 is a multiple of 3 for n≥1 using PMI, we will first establish the base case and then prove the induction step.
Base case:
When n=1, we have:
22n+1 + 7 = 22(1)+1 + 7 = 4+7 = 11
11 is not a multiple of 3. So the statement is not true for n=1.
Induction step:
Assuming that the statement is true for some integer k≥1, we will prove that it is also true for k+1.
So, we need to show that:
22(k+1)+1 + 7 is a multiple of 3
Expanding the expression, we have:
22(k+1)+1 + 7 = 2 x 22k+1 x 2 + 7
= 2 x 22k+2 + 7
We can write 2 as (3-1), and substitute it in the expression:
2 x 22k+2 + 7 = (3-1) x 22k+2 + 7
= 3 x 22k+2 - 22k+2 + 7
Notice that 22k+2 is a multiple of 3 because 22k+1 is even, and 22 is a multiple of 3. Therefore, we have:
3 x 22k+2 - 22k+2 + 7 = 3 x (22k+2) + (-22k+2 + 7)
= 3 x (22k+2) + (-22k+5)
Now, let's consider the expression (-22k+5). We can rewrite it as (-22k+3+2):
(-22k+5) = (-22k+3+2) = -3 x 2k+1 + 2 x 1
Since 2k+1 is odd, we can write it as 2j+1, where j is an integer. Substituting this value in the expression, we have:
-3 x 2k+1 + 2 x 1 = -3 x 2j+2 + 2
= -3 x (2j+1) + 2
= -3 x 2j+1 + (-3+2)
= -3 x 2j+1 - 1
So, we can rewrite the original expression as:
3 x (22k+2) + (-22k+5) = 3 x (22k+2) - 3 x 2j+1 - 1
= 3 x (22k+2 - 2j-1) - 1
Notice that 22k+2 - 2j-1 is an even number, and therefore, it can be written as 2m for some integer m. Substituting this value, we have:
3 x (22k+2 - 2j-1) - 1 = 3 x 2m - 1
= 3m + 3m + 3 - 1
= 3 x (2m+1) + 2
Since 2m+1 is an integer, we can conclude that 22(k+1)+1 + 7 is a multiple of 3.
Therefore, by PMI, we can conclude that 22n+1 +7 is a multiple of 3 for n≥1.
To know more about multiple , visit:
https://brainly.com/question/5992872
#SPJ1
1. Which set of side lengths COULD be a RIGHT TRIANGLE?
A. 6, 11, 15
B. 7, 20, 28
C. 9, 40, 41
D. 12, 30, 39
(a) If A is a 3 × 5 matrix, then the rank of A is at most . Why?(b) If A is a 3 × 5 matrix, then the nullity of A is at most . Why?(c)If A is a 3 × 5 matrix, then the rank of AT is at most . Why?(d) If A is a 3 × 5 matrix, then the nullity of AT is at most . Why?AT= A transpose
The following parts can be answered by the concept of Matrix.
(a) If A is a 3 × 5 matrix, then the rank of A is at most 3. This is because the rank is the maximum number of linearly independent rows (or columns) in a matrix, and since A has only 3 rows, it cannot have more than 3 linearly independent rows.
(b) If A is a 3 × 5 matrix, then the nullity of A is at most 5. The nullity is the dimension of the null space of A, which is the space of all solutions to the homogeneous system Ax = 0. The number of variables in this system is equal to the number of columns in A, which is 5. Therefore, the nullity cannot exceed 5.
(c) If A is a 3 × 5 matrix, then the rank of AT (A transpose) is at most 3. When transposing A, the number of rows and columns are switched, making AT a 5 × 3 matrix. The rank is still the maximum number of linearly independent rows (or columns), so the rank of AT cannot be more than the number of rows in AT, which is 3.
(d) If A is a 3 × 5 matrix, then the nullity of AT (A transpose) is at most 5. Since AT is a 5 × 3 matrix, the nullity corresponds to the dimension of the null space for the homogeneous system ATx = 0, with 3 variables. By the rank-nullity theorem, the rank plus the nullity of a matrix equals the number of columns in the matrix.
Therefore, the nullity of AT is at most 5, as the number of columns in A is 5.
To learn more about Matrix here:
brainly.com/question/28180105#
#SPJ11
From the results of an attribute agreement analysis, 2 operators are found to produce different results. What corrective action(s) may be taken? A This is reproducibility error that can be corrected through training. B Use a single expert (capable) for all experimental readings, and then train all other operators to match the ability of the expert prior to releasing the process change. C Check the Operational Definition and revise it if needed. D All of the above. E None of the above.
All the options (A, B, and C) are correct, and the correct answer is D.
What is Reproducibility error ?
Reproducibility error refers to the variability in measurement results that occurs when different operators or instruments measure the same characteristic or feature. This type of error can arise due to differences in measurement techniques, measurement equipment, or human error.
If the results of an attribute agreement analysis show that two operators are producing different results, there may be several corrective actions that can be taken:
A. Training: Reproducibility errors can be corrected through training. The operators can be trained to follow the same methods and procedures to reduce differences in their results.
B. Single expert: Using a single expert for all experimental readings can ensure consistency in the results. Other operators can be trained to match the ability of the expert before releasing the process change.
C. Operational Definition: Checking the operational definition and revising it if needed can help to ensure that all operators are following the same methods and procedures.
Therefore, all the options (A, B, and C) are correct, and the correct answer is D.
To learn more about Reproducibility error from given link.
https://brainly.com/question/31433812
#SPJ1
2. Using 3.14 as a value of n, find the approximate volume of each sphere below. Round to
the nearest cubic inch.
a)
4 in
Like
example 1
b)
12 in
Answer:
a: 268 [tex]in^{3}[/tex]
b: 904 [tex]in^{3}[/tex]
Step-by-step explanation:
Volume of a sphere: [tex]\frac{4}{3} \pi r^3[/tex]
a: [tex]\frac{4}{3} (3.14)(4)^3[/tex] = 267.95
b: r = 12/2 = 6
[tex]\frac{4}{3} (3.14)(6)^3[/tex] = 904.32
4. Find the length of arc s.
7 cm
0
02 cm.
5 cm
The length of the arc s as required to be determined in the task content is; 17.5 cm.
What is the length of the arc s?It follows from the task content that the length of the arc s is to be determined from the given information.
By observation, the angle subtended at the center of the two concentric circles is same for the 2cm and 5 cm radius circles.
Therefore, it follows from proportion that the length of an arc is directly proportional to the radius of the containing circle.
Therefore, the ratio which holds is;
s / 5 = 7 / 2
s = (7 × 5) / 2
s = 17.5 cm.
Ultimately, the length of the arc s is; 17.5 cm.
Read more on length of an arc;
https://brainly.com/question/28108430
#SPJ1
80% of a number is x. What is 100% of the number? Assume x70.
if 80% of a number is x, then 100% of the number is 1.25x
What is 100% of the number?From the question, we have the following parameters that can be used in our computation:
80% of a number is x
Represent the number with y
So, we have the following representation
80% of y is x
Express as a product expression
So, we have the following representation
80% * y = x
Divide both sides by 80%
This gives
y = x/80%
Evaluate the quotient
y = 1.25x
Hence, 100% of the number is 1.25x
Read more about percentage at
https://brainly.com/question/843074
#SPJ1
The slope of the line is
The slope of the line is - 1.
What is the slope of a line.A line in the cartesian plane, is a particular set of points. Each point in the plane has a pair of cartesian coordinates, one each corresponding to the x and y coordinate respectively. The slope of the line segment joining two points is the change in the y-coordinate, divided by the change in the x-coordinate, as we move from the first point to the second point. The line as a geometric figure is characterized by the property that, the slope of the line segment joining any two distinct points on the line is the same. This slope is then denoted to be the slope of the line.
How do you find the slope of a line.To calculate the slope of a line, we need two points, on the line. let P,Q be two points on the line. Let [tex](x_p,y_p), (x_q,y_q)[/tex] be the coordinates of the two points. then the slope of the line segment [tex]{PQ}[/tex] is the ratio [tex]\frac{y_p-y_q}{x_p-x_q}[/tex] . This is also equal to the slope of the line containing the points P, Q
In our question the line passes through the points, (1,2) and (-1,4). These points are marked on the line with highlighted dots. So the slope of the line in the picture is (4-2)/(-1-1) = 2/-2 = -1
To know more about the slope of lines, visit:
https://brainly.com/question/19131126
#SPJ1
calculate an upper confidence bound for the true average time that blackbirds spend on a single visit at the experimental location.
The upper confidence bound for the true average time that blackbirds spend on a single visit at the experimental location.
An upper confidence bound for the true average time that blackbirds spend on a single visit at the experimental location, you would need to collect data on the duration of each blackbird's visit.
Once you have this data, you can use statistical methods to calculate the upper confidence bound.
One common approach is to use the formula:
Upper Confidence Bound = Sample Mean + (Z-Score x Standard Error)
The Z-score corresponds to the desired level of confidence, such as 95% or 99%, and can be found in a standard normal distribution table.
The standard error is calculated using the sample size and sample standard deviation.
For example,
If you have a sample size of 50 blackbirds and a sample mean duration of 10 minutes with a sample standard deviation of 2 minutes, and you want a 95% confidence level, the Z-score would be 1.96.
The standard error would be 2 / sqrt(50) = 0.28.
Plugging these values into the formula, you would get:
Upper Confidence Bound = 10 + (1.96 x 0.28)
Upper Confidence Bound = 10.55
Therefore,
We can say with 95% confidence that the true average time that blackbirds spend on a single visit at the experimental location is less than or equal to 10.55 minutes.
For similar questions on upper confidence:
https://brainly.com/question/13242669
#SPJ11
The graph of the function g(x) = -x is shown on the grid below. which of the following is the graph of y = g(x)-6?
Note that the graph of y=g(x) -6 where g(x) = -x is represented by the funciton y = -x-6. See graph attached.
What is the rationale for the above?The graph of the function g(x) = -x is a straight line passing through the origin with a slope of -1.
To find the graph of y = g(x) - 6, we need to shift the graph of g(x) downward by 6 units.
This can be done by subtracting 6 from the y-coordinate of every point on the graph of g(x).
Therefore, the graph of y = g(x) - 6 is obtained by shifting the graph of g(x) downward by 6 units. The resulting graph is a straight line passing through the point (0, -6) with a slope of -1.
Where the function is y = -x - 6
Learn more about function:
https://brainly.com/question/12431044
#SPJ1
Help please on this math problem asap
35 POINTS
Answer: D
Step-by-step explanation: I'm sorry if you get it wrong!!! I'm PRETTY SURE IT'S D .
Find two consecutive integers such that five times the first is equal to six times the second
The two consecutive integers are -6 and -5
What are algebraic expressions?Algebraic expressions are defined as expressions that are composed of coefficients, terms, variables, constants and factors.
Algebraic expressions are also made up of mathematical operations, such as;
AdditionBracketParenthesesSubtractionMultiplicationDivisionFrom the information given;
Let the consecutive integers
x and x + 1
Then, we get;
5x = 6(x + 1)
expand the bracket
5x = 6x + 6
collect the like terms
-x = 6
x = -6
x + 1 = -6 + 1 = -5
Learn more about algebraic expressions at: https://brainly.com/question/4344214
#SPJ1
find a set of smallest possible size that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets.
The smallest set that satisfies the given condition is [tex][2, 4][/tex].
A subset is a group of items that are all a component of another, bigger set in set theory. When all the components of one set are also components of another, a subset is created. In other words, every component of the smaller set is likewise a part of the bigger one.
To find the smallest set that has both [tex][1, 2, 3, 4, 5][/tex] and [tex][2, 4, 6, 8, 10][/tex] as subsets, we need to determine the common elements between the two sets.
Both sets have elements 2 and 4 in common. So, we can include these elements in our smallest set.
The smallest set that satisfies the given condition is [tex][2, 4][/tex].
This set is the smallest possible because it includes all the common elements between the two subsets.
To know more about subsets follow
https://brainly.com/question/31481757
#SPJ12
suppose that the supply function for a good is p=4x^2 18x 7. if the equilibrium price is 259 per unit, what is the producer's surplus there?
The producer's surplus at the equilibrium price of 259 per unit is 882. Here, the supply function for a good is p = 4x^2 + 18x + 7, and the equilibrium price is 259 per unit, we need to find the producer's surplus.
Step 1: The equilibrium quantity (x) by setting the supply function equal to the equilibrium price:
259 = 4x^2 + 18x + 7
Step 2: Solve for x:
4x^2 + 18x + 7 - 259 = 0
4x^2 + 18x - 252 = 0
Using the quadratic formula or factoring, we find that x = 7 (the positive equilibrium quantity).
Step 3: Calculate the producer's surplus. The producer's surplus is the area between the supply curve and the equilibrium price, up to the equilibrium quantity:
Producer's Surplus = 0.5 * (base) * (height)
Base = equilibrium quantity = 7
Height = equilibrium price - supply price at x = 0 (the intercept of the supply curve)
Height = 259 - (4 * 0^2 + 18 * 0 + 7) = 259 - 7 = 252
Step 4: Plug in the values to calculate the producer's surplus:
Producer's Surplus = 0.5 * 7 * 252 = 882
So, the producer's surplus at the equilibrium price of 259 per unit is 882.
Learn more about equilibrium price here, https://brainly.com/question/26075805
#SPJ11
true or false and explain why or why not. you are more likely to make type ii error with a t-test than with a comparable z-test.
The given statement is "You are more likely to make a Type II error with a t-test than with a comparable z-test." can either be true or false because it depends on the sample size and the underlying population distribution.
A t-test is used when the population standard deviation is unknown and is estimated from the sample data.
The t-distribution is used to account for the uncertainty in estimating the population standard deviation. As the sample size increases, the t-distribution approaches the z-distribution (or standard normal distribution).
A z-test is used when the population standard deviation is known or the sample size is large. It uses the standard normal distribution for hypothesis testing.
When the sample size is small and the underlying population distribution is non-normal, a t-test may have a higher chance of making a Type II error compared to a z-test.
However, when the sample size is large or the underlying population is normally distributed, the difference in the likelihood of making a Type II error between the two tests becomes negligible.
In summary, whether you are more likely to make a Type II error with a t-test than with a comparable z-test depends on the sample size and the underlying population distribution.
Learn more about t-test:
https://brainly.com/question/27192813
#SPJ11
Question: N is a Geometric distribution with a mean of 2. a)Find the P [NT] for NNTT = 1, 2, 3, … b)Find the E[NT] c)Find the Var (NT) d)Find the P[NM] ...
The E[NT] c)Find the Var (NT) is 3/4.
a) To find P[NNTT = n], we can use the probability mass function (PMF) of the geometric distribution, which is given by:
P[N = k] = (1-p)^(k-1) * p
where p is the probability of success and k is the number of trials until the first success.
In this case, since N has a mean of 2, we know that p = 1/2, since the expected value of a geometric distribution with parameter p is 1/p. Therefore, we can write:
P[NNTT = n] = P[N = n] * P[N = n-1] * P[T] * P[T]
where P[T] is the probability of getting a T, which is 1/2.
Using the PMF of the geometric distribution, we can compute P[N = k] as:
P[N = k] = (1-p)^(k-1) * p
= (1-1/2)^(k-1) * 1/2
= 1/2^k
Therefore, we have:
P[NNTT = 1] = 0 (since we need at least two trials to get NNTT)
P[NNTT = 2] = P[N = 1] * P[N = 1] * P[T] * P[T] = 1/2 * 1/2 * 1/2 * 1/2 = 1/16
P[NNTT = 3] = P[N = 2] * P[N = 1] * P[T] * P[T] = 1/4 * 1/2 * 1/2 * 1/2 = 1/32
P[NNTT = 4] = P[N = 3] * P[N = 2] * P[T] * P[T] = 1/8 * 1/4 * 1/2 * 1/2 = 1/64
and so on.
b) To find E[NT], we can use the formula for the expected value of a geometric distribution, which is 1/p. In this case, since p = 1/2, we have:
E[N] = 1/p = 2
Therefore, E[NT] = E[N] + E[T] = 2 + 1/2 = 5/2.
c) To find Var(NT), we can use the formula for the variance of a geometric distribution, which is (1-p)/p^2. In this case, we have:
Var(N) = (1-p)/p^2 = (1-1/2)/(1/2)^2 = 2
Var(T) = (1/2)*(1/2) = 1/4
Therefore, Var(NT) = Var(N)E[T]^2 + Var(T)E[N]^2 = 2*(1/2)^2 + (1/4)*2^2 = 3/4.
d) To find P[NM], we need to know the value of M, which is not given in the problem statement. Therefore, we cannot compute P[NM] without additional information about M.
To learn more about probability visit: https://brainly.com/question/30034780
#SPJ11
The table shows the total number of student applications to universities in a particular state for a random sample of 12 semesters.
What is the approximate sample mean for student applications, in thousands?
A. 2,565
B. 32.9
C. 256.5
D. 214
Answer:
To calculate the approximate sample mean for student applications, in thousands, you can sum up the total number of student applications for the 12 semesters and then divide by 12.
Add up the total number of student applications for the 12 semesters:
106 + 137 + 285 + 120 + 202 + 195 + 327 + 139 + 307 + 318 + 212 + 217 = 2,563
Divide the sum by 12 to get the sample mean:
2,563 / 12 ≈ 213.6
So, the approximate sample mean for student applications, in thousands, is approximately 213.6.
Answer: D. 214
Step-by-step explanation:
how many different 2–card hands can be selected from a deck of 52 cards?
There are 1326 different 2-card hands that can be selected from a standard deck of 52 cards, determined by using the formula for combinations.
Let us assumes that each card is equally likely to be drawn and that the deck is well-shuffled. To determine the number of different 2-card hands that can be selected from a standard deck of 52 cards, we use the formula for combination. We want to choose 2 cards out of 52, so the formula is
C(52, 2) = 52! / (2! * (52-2)!) = 52 * 51 / 2 = 1326
Therefore, there are 1326 different 2-card hands that can be selected from a deck of 52 cards.
To know more about combination:
https://brainly.com/question/26409487
#SPJ4
The juror pool for an upcoming trial contains 100,000 individuals in the population who may be called for jury duty. The proportion of the available jurors on the population list who are Hispanic is 0.44. A jury of size 8 is selected at random from the population list of available jurors. Let X = the number of Hispanics selected to be jurors for this jury.
Find the probability that no Hispanic is selected. (Round to four decimal places as needed.)
The probability of no Hispanic being selected is 0.0496 (rounded to four decimal places).
Probability is a branch of mathematics that deals with the study of random events or experiments, and the likelihood or chance of their occurrence. It is a measure of the degree of certainty or uncertainty of an event, expressed as a number between 0 and 1, where 0 indicates that the event will not occur and 1 indicates that the event is certain to occur.
We can model the number of Hispanics selected as jurors with a binomial distribution, where n=8 is the number of trials (selecting jurors), and [tex]$p=0.44$[/tex] is the probability of success (selecting a Hispanic juror).
The probability of selecting no Hispanic jurors is given by:
[tex]$P(X=0) = \binom{8}{0}(0.44)^0(1-0.44)^8 \approx 0.0496$[/tex]
So the probability of no Hispanic being selected is 0.0496 (rounded to four decimal places).
To learn more about probability visit: https://brainly.com/question/30034780
#SPJ11
The probability of no Hispanic being selected is 0.0496 (rounded to four decimal places).
Probability is a branch of mathematics that deals with the study of random events or experiments, and the likelihood or chance of their occurrence. It is a measure of the degree of certainty or uncertainty of an event, expressed as a number between 0 and 1, where 0 indicates that the event will not occur and 1 indicates that the event is certain to occur.
We can model the number of Hispanics selected as jurors with a binomial distribution, where n=8 is the number of trials (selecting jurors), and [tex]$p=0.44$[/tex] is the probability of success (selecting a Hispanic juror).
The probability of selecting no Hispanic jurors is given by:
[tex]$P(X=0) = \binom{8}{0}(0.44)^0(1-0.44)^8 \approx 0.0496$[/tex]
So the probability of no Hispanic being selected is 0.0496 (rounded to four decimal places).
To learn more about probability visit: https://brainly.com/question/30034780
#SPJ11
help someone need help on this question
The area of the figure is 141.5 units²
What is area of figures?The space enclosed by the boundary of a plane figure is called its area. The area is measured in units².
The figure can be sub divided into 3 parts,
The first part is a rectangle,
Area of rectangle = l× w
= 6× 8
= 48units²
The second part is also a rectangle
The area of a rectangle = l×w
= 5 × 11
= 55 unit²
The third part is a triangle
area of a triangle = 1/2 bh
= 1/2 × 11 × 7
= 77/2 = 38.5 units²
therefore the area of the figure = 38.5 + 55+48
= 141.5 units²
learn more about area of figures from
https://brainly.com/question/11423300
#SPJ1
the sum of two consecutive odd numbers is 56. find the numbers
Answer:
27 , 29
Step-by-step explanation:
Consecutive odd numbers means that, if the lesser number is denoted by the variable, x, that the given equation is:
[tex](x) + (x + 2) = 56[/tex]
Solve. First, combine like terms, then isolate the variable, x:
[tex]x + x + 2 = 56\\(x + x) + 2 = 56\\2x + 2 = 56[/tex]
Do the opposite of PEMDAS. PEMDAS is the order of operations, and stands for:
Parenthesis
Exponents (& Roots)
Multiplications
Divisions
Additions
Subtractions
~
First, subtract 2 from both sides of the equation:
[tex]2x + 2 = 56\\2x + 2 (-2) = 56 (-2)\\2x = 56 - 2\\2x = 54[/tex]
Next, divide 2 from both sides of the equation:
[tex]2x = 54\\\frac{(2x)}{2} = \frac{(54)}{2}\\ x = \frac{54}{2}\\ x = 27[/tex]
Next, solve for the consecutive odd number. Plug in 27 for x:
[tex](x) = 27\\(x) + 2 = (27) + 2 = 29[/tex]
Check. Add 27 with 29:
[tex]27 + 29 = 56\\56 = 56\\\therefore 27 , 29[/tex]
27 , 29 is your answer.
~
Learn more about solving consecutive numbers, here:
https://brainly.com/question/2493629
find the area of the shaded region
SHOW YOUR SOLUTION
Answer:
1. 15.72m²
2. 48dm²
3. 4m²
Step-by-step explanation:
1.
area of unshaded circle=
r=3m. πr^2. (22/7)×3×3= 28.29
area of shaded circle
radius= total radius- unshaded circle radius
r=5m-3m = 2m
Area= πr^2. (22/7)×2×2= 12.57
therefore area= unshaded-shaded
28.29-12.57= 15.72
2.
area of unshaded= area of square = L²
8×8=64
area of shaded= length= 8-2-2= 4
4×4= 16
total area =
64-16= 48
3.
area of triangle= (b×h)/2
(7×6)/2= 42/2= 12
area of rectangle= L×b
4×2= 8
area=12-8= 4
Does either of P = (4, 11, 25) or Q = (-1, 6, 16) lie on the path r = (1 + t, 2 + t^2, t^4)? Both points lie on the path of r(t). Point P lies on the path of r(t). Point Q lies on the path of r(t). Neither point lies on the path of r(t). Find a vector parametrization of line through P = (3, 7, 4) in the direction v = (7, -8, 4) r(t) =
The correct statement is:
Point P lies on the path of r(t).Point Q does not lie on the path of r(t).The vector parametrization of the line is:
x = 3 + 7ty = 7 - 8tz = 4 + 4tHow to determine whether points lie on the path?To determine whether points P = (4, 11, 25) or Q = (-1, 6, 16) lie on the path r = (1 + t, 2 + t², t⁴), we can substitute the values of P and Q into the parametric equations of r(t) and see if they satisfy the equations.
For point P = (4, 11, 25):
Substituting into r(t):
x = 1 + t
y = 2 + t²
z = t⁴
Comparing with P = (4, 11, 25), we see that all the coordinates match. Therefore, point P lies on the path of r(t).
For point Q = (-1, 6, 16):
Substituting into r(t):
x = 1 + t
y = 2 + t²
z = t⁴
Comparing with Q = (-1, 6, 16), we see that none of the coordinates match. Therefore, point Q does not lie on the path of r(t).
So, the correct statement is:
Point P lies on the path of r(t).
Point Q does not lie on the path of r(t).
How to the vector parametrization of line?To find a vector parametrization of the line through P = (3, 7, 4) in the direction v = (7, -8, 4), we can use the point-direction form of a parametric equation for a line:
r(t) = P + t * v
Substituting the values of P and v, we get:
r(t) = (3, 7, 4) + t * (7, -8, 4)
So the vector parametrization of the line is:
x = 3 + 7t
y = 7 - 8t
z = 4 + 4t
Lean more about parametric equations
brainly.com/question/28537985
#SPJ11
Choose the answer. The rate of change of y with respect to tis 3 times the value of the quantity 2 less than y. Find an equation for y given that y 212 when t=0
You get: y = 212e^3t + 2 y = 210e^3t - 2 y = 210e^3t+2
y = 212e^3t-2 y=214e^3t-2
If the rate of change of y with respect to t is 3 times the value of the quantity 2 less than y, then the equation for y is y = 210e^(3t) + 2.
Explanation:
Let's work on this problem step by step:
Step 1: The problem states that the rate of change of y with respect to t is 3 times the value of the quantity 2 less than y. This can be represented as:
dy/dt = 3(y - 2)
Step 2: We are also given that y = 212 when t = 0. This will be used later to find the constant of integration.
Step 3: Now, we need to solve the differential equation. To do this, first, separate the variables:
dy/(y - 2) = 3 dt
Step 4: Integrate both sides with respect to their respective variables:
∫(1/(y - 2)) dy = ∫(3) dt
Step 5: This gives:
ln|y - 2| = 3t + C
Step 6: To find the constant of integration C, use the given condition that y = 212 when t = 0:
ln|212 - 2| = 3(0) + C
ln|210| = C
Step 7: Substitute C back into the equation:
ln|y - 2| = 3t + ln|210|
Step 8: To remove the natural logarithm, use the exponential function:
y - 2 = 210 * e^(3t)
Step 9: Add 2 to both sides of the equation to isolate y:
y = 210 * e^(3t) + 2
So, the equation for y is y = 210e^(3t) + 2.
Know more about the differential equation click here:
https://brainly.com/question/17651356
#SPJ11
-11 -(23)+(-6)-(+2)-5+1
Answer:
Step-by-step explanation:
-11 -(23)+(-6)-(+2)-5+1
-11 - 23 - 6 - 2 - 5 + 1
-47 + 1
-46
If a device shows that a place has high humidity but there are not clouds in the sky you can say that is because a. the temperature is at its minimum b. the temperature is too cold c. the temperature is too warm
d. the temperature is cooling off
Correct answer is c. the temperature is too warm When the temperature is warm, it can cause a higher rate of evaporation, which increases humidity.
Describe why this statement is right?If a device shows that a place has high humidity but there are no clouds in the sky, you can say that it is because the temperature is too warm. High humidity occurs when the air is holding a lot of moisture, and warm air can hold more moisture than cool air.
As the temperature rises, the air can hold more and more moisture until it reaches a point where it becomes saturated, leading to high humidity. Therefore, if there are no clouds in the sky, it is likely that the temperature is high and causing the high humidity reading.
Learn more about evaporation.
brainly.com/question/320765
#SPJ11
complete the table to show the steps for combining like terms
The completed table for collecting like terms is found in the attachment and the final answer is -2 + 3x.
What is the Distributive Property, Associative Property, andCommutative Property?The Distributive Property, Associative Property, and Commutative Property are properties of arithmetic operations that help to simplify mathematical expressions and equations.
Distributive Property:
The Distributive Property states that when we multiply a number by a sum or difference of two or more terms, we can distribute the multiplication over each term inside the parentheses. The formal statement is:
a × (b + c) = (a × b) + (a × c)
a × (b - c) = (a × b) - (a × c)
For example, if we have the expression 3(x + 2), we can distribute the 3 over the sum inside the parentheses to get:
3(x + 2) = 3x + 6
Associative Property:
The Associative Property states that when we add or multiply three or more numbers, we can group them in any way we want, without changing the result. The formal statements are:
(a + b) + c = a + (b + c)
(a × b) × c = a × (b × c)
Commutative Property:
The Commutative Property states that when we add or multiply two numbers, we can switch their order, without changing the result. The formal statements are:
a + b = b + a
a × b = b × a
Learn more about distributive property at: https://brainly.com/question/4077386
#SPJ1