The probability that a randomly selected male college student gains 15 lb or more during their freshman year is 11.6%
What is Probability ?Probability is defined as the likeliness of an event to happen.
Let X be a random variable that shows the term "freshman 15" that claims that students typically gain 15lb during their freshman year at college.
It is given that
X follows is a normal distribution with a mean of 2.1 lb (μ) and a standard deviation (σ) of 10.8 lb.
Population Mean (μ) = 2.1
Population Standard Deviation (σ) = 10.8
We need to compute Pr(X≥15). The corresponding z-value needed to be computed is:
[tex]\rm Z_{lower} = \dfrac{ X_1 -\mu }{\sigma}\\\\Z_{lower} = \dfrac{ 15-2.1 }{10.8}\\\\\\Z_{lower} = 1.19[/tex]
Then the probability is given as
[tex]\rm Pr(X \geq 16 ) = Pr (\dfrac{X -21}{10.8} \geq \dfrac{15-21}{10.8})\\\\= Pr (Z \geq \dfrac{15-2.1}{10.8}\\\\= Pr (Z\geq 1.19)\\\\ = 0.1162[/tex]
Pr(X≥15)=0.1162. (11.6%)
The probability that a randomly selected male college student gains 15 lb or more during their freshman year is 11.6%
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Please help me with problem 3 (a-d). Thank you!
Using the spread sheet we can easily get the answers:
The statistical section helps find answers by putting the accurate formula or the graphing calculator.
ANOVA
Source of Variation SS df MS F P-value F crit
Between Groups 1471.33 2 735.68 11.59 0.001072834 3.7389
Within Groups 888.55 14 63.4677
Total 2359.882 16
The APA style refers to Times New Roman Font 12 pts.
The effect size of the result is 0.6233 medium
Part A
ANOVA
Source of Variation SS df MS F P-value F crit
Between Groups 1471.33 2 735.68 11.59 0.001072834 3.7389
Within Groups 888.55 14 63.4677
Total 2359.882 16
1) The null and alternative hypotheses are
H0: u1=u2=u3
Ha: Not all means are equal
2) The significance level is alpha = 0.05
3) The test statistic F = sb²/sw²
Which if H0 is true has an F distribution with ν1=2 and v2= 14 degrees of freedom.
The computations are
Anova: Single Factor
Groups Count Sum Average Variance
Column 1 6 373 62.16666667 78.96666667
Column 2 4 324 81 60.66666667
Column 3 7 402 57.42857143 51.95238095
ANOVA
Source of Variation SS df MS F P-value F crit
Between Groups 1471.33 2 735.68 11.59 0.001072834 3.7389
Within Groups 888.55 14 63.46768707
Total 2359.882353 16
5) The critical region is F ≥ F(0.05)(2,14) = 3.74
6) Conclusion:
Since the computed value F= 3.73 does not fall in the critical region F> 3.74 so we accept H0 and conclude that there is no significant difference in the three means.
Part D: The effect size of the result is 0.6233 medium and calculated by
η²= ss between/ ss between + ss error
η²= 1471/1471+889
η²= 0.6233
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if f(x)=(x^m+9)^2, which statement about f(x) is true? a. f(x) is an even function for all vaues of m. b.f(x) is an even function for all even values of m. c.f(x) is an odd function for all values of m. d.f(x) is an odd function for all odd values of m.
Answer: b. f(x) is an even function for all even values of m.
Step-by-step explanation:
[tex]f(x)=(x^m +9)^2[/tex]
If m is even, then [tex](-x)^m=x^m[/tex].
This means that [tex]f(-x)=(x^m+9)^2 \implies f(-x)=f(x)[/tex]
Thus, b is the correct answer.
5
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The value of x is:
3
m_ii હું
15
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X
Hello :
3/8 = x/(15 + x)
⇔ 3(15 + x)/8 = x
⇔ (45 + 3x)/8 = x
⇔ 45 + 3x = 8x
⇔ 8x - 3x = 45
⇔ 5x = 45
⇔ x = 45/5
⇔ x = 9
Select all figures that can be proven to be parallelograms by the markings in the diagram. explain answer
All the figures can be proven to be parallelograms by the markings
How to determine the parallelogram?The properties of parallelogram are:
Parallel opposite sidesCongruent opposite sidesDiagonals may or may not be congruentCongruent opposite anglesBased on the above properties, all the figures can be proven to be parallelograms
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10.3 was subtracted from a number then that difference was multiplied by 7 after which the result was divided by 2.5. if the result of that divison is -7 then what was the initial number
Answer:
6
Step-by-step explanation:
i took the test
what is the reminder when X³ +4X² - 2X + I is divided by X + 1 what is the reminder when X³ + 4X² - 2X + I is divided by X + 1
Answer:
6
Step-by-step explanation:
You start your working career when you are 24 years old. Each month, you deposit $144 into a pension plan. You continue making deposits into the plan you are 68 years old. What is the balance, in dollars, when the plan earns 6%, compounded monthlyRound your answer to the nearest cent
The balance, in dollars, (future value) when the pension plan earns 6% compounded monthly is $372,134.19.
What is future value?The future value refers to the compounded future value of an asset, for example, a pension plan, based on a growth rate of interest for a future period.
The future value can be determined with the FV formula, table, or using an online finance calculator as follows:
Data and Calculations:N (# of periods) = 528 months (68 - 24 x 12 months)
I/Y (Interest per year) = 6%
PV (Present Value) = $0
PMT (Periodic Payment) = $144
Results:
FV = $372,134.19
Sum of all periodic payments = $76,032 ($144 x 528)
Total Interest = $296,102.19
Thus, the balance, in dollars, (future value) when the pension plan earns 6% compounded monthly is $372,134.19.
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can someone help me pls :)
Answer:
Second one i believe
Step-by-step explanation:
Well u know the sides arent given
A graph shows the proportional relationship between the number of test questions a student gets correct, x, and the student’s test score, y. The ordered pair (1,5/4) is on the graph. What does the y- coordinate of the ordered pair represent in this relationship.
Answer:
The y-coordinate is 5/4, it represents a test score for one correct answer
Step-by-step explanation:
Proportional relationship is:
y = kx, where k is coefficient of proportion.We have the ordered pair (1, 5/4), which represents:
5/4 = k*1 k = 5/4When x = 1, the y- coordinate is equal to the coefficient of proportionality.
In this case it represents a score for one correct answer.
Choose the most convenient method to graph the line y=−13x+5
Select the correct answer below:
Recognize the equation as that of a vertical line passing through the x-axis at 5
Recognize the equation as that of a horizontal line passing through the y-axis at 5
Identify the slope and y-intercept and then graph
Find the x- and y-intercepts and then graph
Answer:
X and Y intercept
Step-by-step explanation:
X and Y intercept is much easier as the equation is linear it is easy to find the intercepts
The graph of the function f(x)=log6(x) is stretched vertically by a factor of 7, reflected over the x-axis, reflected over the y-axis, and shifted up by 2 units.
The resulting function after all transformations have been carried out is; -7log6(-x) - 2.
Which function results from all the Transformations?The transformations which ensued on the function given are as follows;
Stretched vertically by a factor of 7; Hence, we have; 7f(x) = 7log6(x).Reflected over the x-axis; -7f(x) = -7log6(x).Reflected over the y-axis; -7f(x) = -7log6(-x).Shifted up by 2 units; -7f(x) -2 = -7log6(-x) - 2.On this note, it follows that the resulting function upon all the Transformations is; = -7log6(-x) - 2.
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If the number of types of massages is represented by 4x + 3 and the number of
types of manicures is represented by -6x + 5 and the number of types of pedicures
is represented by 8x - 7, what is the expression for the total number of services they
have to choose from?
The expression for the total number of services the have to choose from is 6x - 1
Simplifying an expressionFrom the question, we are to determine the expression for the total number of services
From the given information,
Number of types of massages = 4x + 3
Number of types of manicures = -6x + 5
Number of types of pedicures = 8x - 7
Then,
Total number of services = 4x + 3 + (-6x + 5) + 8x - 7
Total number of services = 4x + 3 - 6x + 5 + 8x - 7
Total number of services = 4x - 6x + 8x - 7 + 3 + 5
Total number of services = 6x - 1
Hence, the expression for the total number of services the have to choose from is 6x - 1
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Answer: the answer is actually 6x+1, not 6x-1
(a) (2x³+4x²y + 5xy²-3y²)-(x²-3x²y +5xy²-2y²)
Answer:
Your answer is 2x³ + 7x²y + y²- x²
Step-by-step explanation:
(a) ( 2x³ + 4x²y + 5xy² - 3y² ) - ( x² - 3x²y +5xy² - 2y² )
= 2x³ + 4x²y + 5xy² - 3y² - x² + 3x²y - 5xy² + 2y²
= 2x³ + 4x²y + 3x²y + 5xy² - 5xy² + 3y² + 2y² - x²
= 2x³ + 7x²y + y²- x² ans.
Hope its helpful!
Please mark me as brainlist.
Step-by-step explanation:
(a) ( 2x³ + 4x²y + 5xy² - 3y² ) - ( x² - 3x²y +5xy² - 2y² )
= 2x³ + 4x²y + 5xy² - 3y² - x² + 3x²y - 5xy² + 2y²
= 2x³ + 4x²y + 3x²y + 5xy² - 5xy² + 3y² + 2y² - x²
= 2x³ + 7x²y + y²- x² ans.
Una empresa dedicada a la fabricación de ropa para niños ofrece 300 overoles a S/ 75 por unidad y a un precio de S/. 84 por overol. La misma empresa producirá 600 unidades al mes. Escriba, entonces, la ecuación y determine si es de oferta o demanda.
The supply equation of the company's total cost is 0.75x
How to determine the equation?The question implies that we determine the equation of the company production and categorize the equation as demand or supply
The given parameters are:
Overalls = 300Cost price = $0.75 per unitSelling price = $0.84 per unitProduction per month = 600The total cost of production is calculated as:
Total Cost = Overalls * Cost price
To determine the equation, we set the number of overalls to x.
So, we have:
Total Cost = x * 0.75
Evaluate
Total Cost = 0.75x
Hence, the equation of the company's total cost is 0.75x
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Find the y-intercept of the line.
=y−2.1x5.9
The y-intercept given line equation is 5.9.
Given that, the line of the equation is y-2.1x+5.9.
We need to find the y-intercept of the line.
What is slope-intercept form?The standard form of slope-intercept form is y=mx+c.
Where, m=slope and c=y-intercept.
Using the slope-intercept form to find the y-intercept, we get c=5.9.
Hence, the y-intercept given line equation is 5.9.
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100 POINTS!!! Find the exact length of side a.
Has to be one of the four options
Answer: a = 2√3
First method (Pythagoras theorem):
a² + b² = c²
a² + 2² = 4²
a² = 16 - 4
a = √12
a = 2√3
Second method (sine rule):
opposite/hypotenuse = sin(x)
a/4 = sin(60)
a = 4sin(60)
a = 2√3
Third method (tan rule):
opposite/adjacent = tan(x)
a/2 = tan(60)
a = 2tan(60)
a = 2√3
Answer:
2√3
Step-by-step explanation:
From inspection of the given triangle:
Side a is opposite angle A ⇒ a = BCSide b is opposite angle B ⇒ b = ACSide c is opposite angle C ⇒ c = ABAs we cannot be sure that ΔABC is a right triangle since it is not marked as such, use the cosine rule to find the exact length of side a.
Cosine Rule
[tex]a^2=b^2+c^2-2bc \cos A[/tex]
where a, b and c are the sides and A is the angle opposite side a
Given:
A = 60°b = 2c = 4Substitute the given values into the formula and solve for a:
[tex]\implies a^2=2^2+4^2-2(2)(4) \cos 60^{\circ}[/tex]
[tex]\implies a^2=4+16-16\left(\dfrac{1}{2}\right)[/tex]
[tex]\implies a^2=20-8[/tex]
[tex]\implies a^2=12[/tex]
[tex]\implies a=\sqrt{12}[/tex]
[tex]\implies a=\sqrt{4 \cdot 3}[/tex]
[tex]\implies a=\sqrt{4}{\sqrt{3}[/tex]
[tex]\implies a=2\sqrt{3}[/tex]
Therefore, the exact length of side a is 2√3.
To find out if ΔABC is a right triangle, use Pythagoras Theorem to solve for side a:
[tex]\implies a^2+b^2=c^2[/tex]
[tex]\implies a^2+2^2=4^2[/tex]
[tex]\implies a^2+4=16[/tex]
[tex]\implies a^2=12[/tex]
[tex]\implies a=\sqrt{12}[/tex]
[tex]\implies a=2\sqrt{3}[/tex]
As the measure of side a is the same as the solution found when using the cosine rule, we can conclude that ΔABC is a right triangle.
4cos(-5B) sin3B is equivalent to
The trigonometric identity 4cos(-5B) sin3B is equivalent to 2[sin(8B) - sin(2B)]
How to find the trigonometric identity 4cos(-5B) sin3B is equivalent to?Since we have 4cos(-5B) sin3B
Using the trigonometric identity
sin(x + y) - sin(x - y) = 2cosxsiny
So, cosxsiny = [sin(x + y) - sin(x - y)]/2
Since we have 4cos(-5B) sin3B, comparing cos(-5B) sin3B with cosxsiny, we have
x = -5B and y = 3B
So, we have cos(-5B)sin3B = [sin(-5B + 3B) - sin(-5B - 3B)]/2
= [sin(-2B) - sin(-8B)]/2
= [-sin(2B) - {-sin(8B)}]/2 [since sin(-2B) = -sin(2B)]
= [-sin(2B) + sin(8B)]/2
= [sin(8B) - sin(2B)]/2
So, 4cos(-5B)sin3B = 4 × [sin(8B) - sin(2B)]/2
= 2[sin(8B) - sin(2B)]
So, the trigonometric identity 4cos(-5B) sin3B is equivalent to 2[sin(8B) - sin(2B)]
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Given the graph of the function f(x) shown below, find the average rate of change of the function f(x) on the interval [5,15].
Step-by-step Expression;
- Given; The function f(x) on the interval [ 5,15]
- To find the average rate of change of the function f(x)=?
x = 5 , y = 15,
I can't solve it anymore,please can you solving?
consider the functions f(x) = -2(x-3)² + 2 which is represented by the graph
drag each interval to the correct location in the table to describe key features of f(x) and g(x)
The intervals of the function on the graph are:
Domain = (-∝, ∝)Range = (-∝, 2]Increases (-∝, 3]Decreases [3, ∝)The key features of the function?The function is given as:
f(x) = -2(x-3)² + 2
See attachment for the graph.
From the graph, we have;
Domain = (-∝, ∝)
Because it takes all real values as its input
Range = (-∝, 2]
Because it has a vertex of (3, 2) and the vertex is a maximum
Also, it increases on the interval (-∝, 3] and decreases on the interval [3, ∝)
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99 points answer fast!!!!
The owner of a coffee shop chain creates a graph representing sales in thousands of dollars. She describes the characteristics as follows:
• There have been two turning points in sales this year.
• Sales are expected to increase in the long run.
• The least amount of sales during the year is about $250,000.
Which graph correctly shows the coffee shop’s sales?
Answer:
Step-by-step explanation:
So given the three bits of information you can conclude a couple of things. The end behavior towards the right should be increasing and since there is only two turning points this means it was previously going down but had a turning point and starting going up, and before that it was going up and then started going down, those will be the two turning points. So on the left side it should be decreasing and the right side it should be increasing. The last peace of information tells you that at the second turning point, should be equal to 250k when it turned back up OR the y-intercept is 250k. Given all this information the answer should be the first graph in the first picture
Answer: D
Step-by-step explanation:
Blood contains three types of cells including red blood cells, white blood cells, and platelets. For approximately every 420 red blood cells in humans with certain medical conditions,
there are 30 platelets and 2 white blood cells. Write the ratio of red blood cells to platelet cells.
O Points:
a simplified fraction)
Step-by-step explanation:
Evalate the expression when m=4 and m=6
how to find the determinant of a 4×4 matrix
Answer:
Step-by-step explanation:
On the coordinate plane below, what is the length of AB? A coordinate plane is shown with a rectangle with the following points A at negative 6, 5; B at 8, 5; C at 8, negative 4; D at negative 6, negative 4. All points are connected to create a rectangle. 8 units 9 units 13 units 14 units
The length of AB wit the coordinate (-6, 5) and (8,5). is 14 units
Distance between two pointsA rectangle is a quadrilateral with 4 sides and angles
Taking the length of AB.
Since AB is slant line, the length of AB will be determined using the distance formula as shown;
D = √(-6-8)² +(5-5)
D = √(-14)²
D = AB = 14 units
Hence the length of AB wit the coordinate (-6, 5) and (8,5). is 14 units
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The manufacturer is considering production quantities of 40,000 units or 80,000 units. For the 40,000 unit plan, assume 95% of product will be sold and 5% will be salvaged; for the 80,000 unit plan, assume 80% of product will be sold and 20% will be salvaged.
The production quantity of 40,000 units, it is estimated that 38,000 units will be sold and 2,000 units will be salvaged. For the production quantity of 80,000 units, it is estimated that 64,000 units will be sold and 16,000 units will be salvaged.
Based on the information provided, let's analyze the production quantities of 40,000 units and 80,000 units, considering the assumptions for product sales and salvage.
40,000 unit plan:
Sold: 95% of 40,000 units = 0.95 * 40,000 = 38,000 units
Salvaged: 5% of 40,000 units = 0.05 * 40,000 = 2,000 units
80,000 unit plan:
Sold: 80% of 80,000 units = 0.80 * 80,000 = 64,000 units
Salvaged: 20% of 80,000 units = 0.20 * 80,000 = 16,000 units
Therefore, for the production quantity of 40,000 units, it is estimated that 38,000 units will be sold and 2,000 units will be salvaged.
For the production quantity of 80,000 units, it is estimated that 64,000 units will be sold and 16,000 units will be salvaged.
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Twice the sum of two consecutive integers is 22. What are the two integers?
HELP! ASAP!
Thank you in advance :)
By the corresponding angles theorem,
∠AFG, ∠BGD, and ∠CHD are congruent∠BAF, ∠CBG, and ∠DCH are congruentThus, triangles AFD, BGD, and CHD are similar by AA.
Answer:
If all of these are parralel and all touching a single line(FD), then they must be the same. Also, they are perpendicular. :/
Step-by-step explanation:
Sheridan Rental Company provided the following information to its auditors. For the year ended March 31, 2017, the company had revenues of $880,300, general and administrative expenses of $353,300, depreciation expenses of $131,455, leasing expenses of $108,195, and interest expenses equal to $78,122. If the company's average tax rate is 34 percent, what is its net income after taxes?
If the company's average tax rate is 34 percent, Its net income after taxes is: $138,090.48.
Net income after taxes
Revenues of $880,300
General and administrative expenses ($353,300)
Leasing expenses ($108,195)
Earning before interest, taxes, depreciation and amortization $418,805
Depreciation expenses ($131,455)
Earning before interest and taxes $287,350
Interest expenses ($78,122)
Earning before taxes $209,228
Taxes 34% $71,137.52
Net income/Loss $138,090.48
Therefore Its net income after taxes is: $138,090.48.
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What is the area of a sector when r = 2 and 0 = 1.75 radians?
Step-by-step explanation:
Area of sector = (θ/2) × r2
= (1.75/2) × 2×2
= (0.875) ×4
= 3.5 In2
In investing $6,150 of a couple's money, a financial planner put some of it into a savings account paying 6% annual simple interest. The rest was invested in a riskier mini-mall development plan paying 9% annual simple interest. The combined interest earned for the first year was $477. How much money was invested at each rate?
Answer:
3200
Step-by-step explanation:
0.13x + 0.04*(6100-x) = 532 dollars.
0.13x + 0.04*6100 - 0.04x = 532
(0.13 - 0.04)x = 532 - 0.04*6100
x = 532 - 0.04 - 6100/0.13-0.04 = 3200
The couple invested:
$2550 in savings account at 6% simple interest annually, and$3600 in development plan at 9% simple interest annually,to earn $477 as the total interest for the first year.
What is interest over an investment?The interest over an investment is the additional amount that a person receives on investing his/her money in the cause.
How to solve the question?In the question, we are informed that in investing $6,150 of a couple's money, a financial planner put some of it into a savings account paying 6% annual simple interest. The rest was invested in a riskier mini-mall development plan paying 9% annual simple interest. The combined interest earned for the first year was $477.
We are asked to find the amount invested in each rate.
We assume the amount invested in savings account to be $x.
Therefore, the amount invested in development plan is $(6150 - x).
Simple interest on a sum of money (P), at a rate (r) over a time period (t), is given as S.I. = (Prt)/100.
We calculate the interest earned in both investments:-
Investment in savings account:
Amount invested (P) = $x.
Rate of interest (r) = 6%.
Time for investment (t) = 1 year.
Therefore, interest received = (Prt)/100 = $(x*6*1)/100 = $ (6x)/100
Investment in development plan:
Amount invested (P) = $(6150 - x).
Rate of interest (r) = 9%.
Time for investment (t) = 1 year.
Therefore, interest received = (Prt)/100 = $((6150 - x)*9*1)/100 = $ {9(6150 - x)}/100.
We know that the total interest received is $477.
Thus on adding Interests from both the investments, we can write an equation:
(6x)/100 + {9(6150 - x)}/100 = 477
or, 6x + 55350 - 9x = 47700,
or, 55350 - 47700 = 3x,
or, 3x = 7650,
or x = 7650/3 = 2550.
Thus, the investments in:
Savings account = $x = $2550.Development plan = $(6150 - x) = $(6150 - 2550) = $3600.Learn more about simple interests at
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factor: (14.25r^4-24.375r^3+10.125)=0
Answer:
1, 1.5
Step-by-step explanation:
Use the rational roots theorem. Factor out until you get the maximum simplification.
0.375(x−1)(2x−3)(19x2+15x+9)
However, if you wanted to solve this equation for r, you will get 1, 1.5 using the quartic formula.