The length of an interval of time such that the probability that no messages arrive during this interval is 0.94 is 56.88 seconds.
We have to find the length of the time interval that the probability of no messages arrive during this interval is 0.94
Let X be the no.of messages arrive to the server
X follows the poisson distribution with mean λ = 17
Let t be the time interval
The probability of no messages arrive during this interval is 0.94
Then P(0) = 0.94
e⁻⁽λt⁾ = 0.94
λt = ln0.94
17 t = ln(0.94)
t = ln(0.94)/17
t = 0.026872 / 17 hrs
t = 0.0158
Convert 0.0158 hours to seconds
That is t=0.0158(60)(60)
=56.88seconds
Hence in 56.88 seconds the time interval that the probability of no messages arrive during this interval is 0.94 .
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Select all the true statements.
The angle bisectors of a triangle intersect at the circumcenter.
A circle is circumscribed about a
• triangle if the triangle's vertices are on the circle.
A circle is inscribed in a triangle if
• the sides of the triangle are tangential to the circle.
The perpendicular bisectors of the
• sides of a triangle intersect at the circumcenter.
All statements that are true from the options are:
The angle bisectors of a triangle intersect at the circumcenter.A circle is circumscribed about a triangle if the triangle's vertices are on the circle.A circle is inscribed in a triangle if the sides of the triangle are tangential to the circle.The perpendicular bisectors of the sides of a triangle intersect at the circumcenter.i. To circumscribe a given shape implies drawing a circle outside the a given shape. While to inscribe a given shape means to draw a circle within the boundaries of the shape.
ii. A tangent is a straight line which intersect the the circumference of a circle at a point externally.
iii. A perpendicular bisector is a straight line that divides a given line into two equal halves. And it is at right angle to the given line.
iv. The circumcenter of a triangle is the middle point/ center of the triangle.
Therefore, the statements that are true are:
The angle bisectors of a triangle intersect at the circumcenter.A circle is circumscribed about a triangle if the triangle's vertices are on the circle.A circle is inscribed in a triangle if the sides of the triangle are tangential to the circle.The perpendicular bisectors of the sides of a triangle intersect at the circumcenter.Thus all the given statements are true.
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A cube of 9cm wan filled with 405cubic centimeters of water what is the height of water in the cube
Answer:
The answer 700 centimeters cubic.
The volume of box is actually 2.300 L. A student makes several measurements to determine the volume of the box. Which of the following measurements listed below is least accurate? A) 2.280L B) 2.291L c) 2.400L D) 2.302L E) 2.300L
Answer:
C) 2.400L
Step-by-step explanation:
A) 2.280L - 2.300L = -0.020L
B) 2.291L - 2.300L = -0.009L
C) 2.400L - 2.300L = 0.100L
D) 2.302L - 2.300L = 0.002L
E) 2.300L - 2.300L = 0.000L
The greatest difference in absolute value between the measurement and the actual volume is 0.100L.
Answer: C)
Write a system of equations for the problem below. You do not have to solve the system. Use x for the number of one-dollar bills, y for the number of five-dollar bills, and z for the number of ten-dollar bills. Top equation: Molly has one-dollar bills, five-dollar bills, and ten-dollar bills in her wallet that are worth a total of . 96 Second Equation: If she had one more one-dollar bill, she would have just as many one-dollar bills as she has fives and tens combined. Third Fquation: She has bills total
In view of Molly's three types of bills
Therefore the first equation is [tex]1x+5y+10z=96[/tex]
Therefore the second equation is [tex]x+1=y+z[/tex]
Therefore the third equation is [tex]x+y+z=23[/tex]
As per the details share in the above question as as follow,
x for the no, of $1 bills
y for the no. of $5 bills.
z for the no. of $10 bills.
We have to find the first, second and third equations.
Therefore worth of x $1 bills is [tex]1 \times x[/tex]
So of y for the no. of $5 bills is [tex]5 \times y[/tex]
And z for the no. of $10 bills is [tex]10 \times z[/tex]
The total worth in molly wallet is $96.
So the equation will be,
[tex]1x+5y+10z=96[/tex]
Now further is molly has one more $1 bill then the number of $1 bill will be same as.
Therefore the second equation is [tex]x+1=y+z[/tex]
Now she had 23 bills,
We also know that she has one-dollar, five-dollar, and ten-dollar notes, with x denoting the quantity of each, Y the number of the five-dollar bill, and Z the number of the ten-dollar bill.
Therefore the third equation is [tex]x+y+z=23[/tex]
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The Shaffer family started on a trip in their car with 18 gallons of gasoline. The car uses 2 gallons of gasoline every hour. If t represents the number of hours spent driving and g represents the number of gallons of gasoline left in the car, which equation could be used to calculate the value of g, if 0 ≤t ≤9
Multiple Choice
g = 18 - 2t
g = 18t - 2
g = 2t - 18 g = 2t + 18
Answer:
g = 18 - 2t
Step-by-step explanation:
They start with 18 gal.
To find how much gas they use while driving:
(2 gal/hr)(t hr)
Subtract that amount from the 18 gal they had in the tank to start with.
g = 18 gal - (2 gal/hr)(t hr)
Find the value of the test statistic for testing whether there is a linear relationship between the and the estimated number. Round your answer to two decimal places, if necessary.
the value of the test statistic for testing whether there is a linear relationship between the and the estimated number is 0.3506905
Using a correlation Coefficient calculator, the correlation Coefficient, r for the data = 0.127
The test statistic :
T = r² / √(1 - r²) / (n - 2)
Sample size, n = 10
Hence,
T = 0.127² / √(1 - 0.127²) / (10 - 2)
T = (0.016129 / 0.3506905)
T = 0.3506905
The value of the test statistic to 2 decimal places is 0.35
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Write the point-slope form of the equation of a line that passes through the point (−1, 6)and is parallel to the line that passes through the points (6, 2) and (2, 4).
y-6=-1/2(x+1)
1. the point-slope form is y-y1=m(x-x1)
x1 and y1 are the coordinates of the point (-1,6) because the line we are looking for its equation passes through it. "m" is the slope.
2. plug in the point (-1,6) in the form from step 1
y-6=m(x+1)
3. to find the slope of this line, the question tells us that this line is parallel to another line that passes through two given points. Any parallel lines, their slopes are the same. That means we have to find the slope of the 2nd line and use it for the 1st line.
The slope formula is m=(y2-y1)/(x2-x1)
plug in the two points m=(4-2)/(2-6), which is equal to -1/2
4. plug in "m" value in the equation from step 2.
Done
3. Solve the equation. Show your work. Express your answer as both a simplified mixed number and as a decimal.
Answer:
c) For the high jump, each competitor receives multiple opportunities to clear the bar at
each height. On average, Shane completes 3 out of 3 jumps on the lowest bar, 5 out of
6 jumps on the middle bar, and 3 out of 4 jumps on the highest bar. What is
Shane’s overall average number of jumps completed? (2 points)
d) If Shane’s average number of jumps completed is greater than one-half, then the eighth
graders earn 50 points. Which grade should be awarded 50 points**? (1 point)
PLEASE QUICK!
c) Shane’s overall average number of jumps completed is of 2.458275.
d) As Shane's overall average number is greater than one half, then the eight graders will be awarded the 50 points.
How to obtain the average number of jumps completed?The jumps that Shane takes are given as follows:
Lowest bar: 100% probability of completed, as 3/3 = 100.Middle bar: 0.8333 = 83.33% probability, as 5/6 = 0.8333.Highest bar: 0.75 = 75% probability, as 3/4 = 0.75.Then the probabilities for each number are given as follows:
One jump -> only the lowest: 1 x (1 - 0.8333) = 0.1667.Two jumps -> lowest and middle: 1 x 0.8333 x (1 - 0.75) = 0.208325.Three jumps -> all -> 1 x 0.8333 x 0.75 = 0.624975.Then the distribution of the number of jumps completed is given as follows:
P(X = 1) = 0.1667.P(X = 2) = 0.208325.P(X = 3) = 0.624975.The expected value of a discrete distribution is calculated as the sum of each outcome multiplied by it's respective probability, hence:
E(X) = 1 x 0.1667 + 2 x 0.208325 + 3 x 0.624975 = 2.458275.
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Write the equation of the line in fully simplified slope-intercept form.
The equation of the line in fully simplified slope-intercept form is y = -x/3 -1
The slope-intercept form of a straight line is used to find a line's equation. We need to know the slope of the line and the intercept where the line crosses the y-axis in order to use the slope-intercept formula.
Consider a straight line with y-intercept b and slope m. For a straight line with slope "m" and y-intercept "b,"
The slope intercept form equation is: y = mx + b.
According to the question,
The line is passing through (3,-2) and (-3 ,0)
Slope of any line passing through two points = y2-y1 / x2-x1
Slope of required line: m = 0 - (-2) / -3 - 3
=> m = -2/6
=> m = -1/3
Equation of line => y = -1/3 x + b -----(1)
As we know this line is passing through (-3,0)
Substituting the value in equation(1)
=> 0 = 1 + b
=> b = -1
Hence , The equation of line is y = -1/3 x -1
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if a linear function is increasing, explain mathematically why the reciprocal function must be decreasing
If a linear function is increasing, the reciprocal function must be decreasing, mathematically because the reciprocal function is the inverse of the linear function
The reciprocal function of a linear function is given by the formula:
f(x) = 1/x
If a linear function is increasing, then its slope (m) is positive. This means that the slope of the reciprocal function must be negative. The slope of the inverse of a linear function is the negative reciprocal of the slope of the linear function, meaning that the slope of the reciprocal function must be negative for the linear function to be increasing.
To illustrate this, we can consider a simple example of a linear function, f(x) = 2x. This linear function has a positive slope (2), so its reciprocal function, f(x) = 1/x, must have a negative slope (-1). This means that the reciprocal function is decreasing.
In general, if a linear function is increasing, then its reciprocal function must be decreasing, as the slope of the reciprocal function must be the negative reciprocal of the slope of the linear function.
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a large university is divided into six colleges, with most students graduating from four of these colleges. the following bar chart gives the distribution of the percent graduating from the four most popular colleges in 2003. the percent of students graduating from either engineering or business is:
A.) ~30%
B.) ~40%
C.) ~50%
D.) Over ~60%
The percentage of students graduating from engineering or business
is ~50%
as per given in the questions
An university is divided into 6 colleges
with which the most of the students graduating from the four of the colleges given in the graph below
the percentage of students who are interested in biological science colleges are 20%
the percentage of students who are interested in mathematics colleges are 10%
the percentage of students who are interested in Engineering colleges are 20%
the percentage of students who are interested in business colleges
are 30%
from the graph, graduating from either Engineering or Business
is = 20% + 30% = 50%
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onvert the integral below to polar coordinates and evaluate the integral. instructions: please enter the integrand in the first answer box, typing theta for . depending on the order of integration you choose, enter dr and dtheta in either order into the second and third answer boxes with only one dr or dtheta in each box. then, enter the limits of integration and evaluate the integral to find the volume. a
As per the polar coordinates, the limits of the integration is written as ∬Df(rcos(θ),rsin(θ))rdrdθ.
What is meant by polar coordinates?
In math, polar coordinates refer a pair of coordinates locating the position of a point in a plane, the first being the length of the straight line ( r ) connecting the point to the origin, and the second the angle ( θ ) made by this line with a fixed line.
Here we have the limits of integration and evaluate the integral to find the volume. for the polar coordinates.
Here we have the polar representation of a point P is the ordered pair (r,θ) where r is the distance from the origin to P and θ is the angle the ray through the origin and P makes with the positive x-axis.
Then the polar coordinates r and θ of a point (x,y) in rectangular coordinates satisfy
=> r=x² + x² and tan(θ)=yx;
Here the rectangular coordinates x and y of a point (r,θ) in polar coordinates satisfy and x=rcos(θ) and y=rsin(θ).
Then the area element dA in polar coordinates is determined by the area of a slice of an annulus and is given by dA=rdrdθ.
Here we have to convert the double integral ∬Df(x,y)dA to an iterated integral in polar coordinates,
Now, we have to substitute rcos(θ) for ,x, rsin(θ) for ,y, and rdrdθ for dA to obtain the iterated integral
=> ∬Df(rcos(θ),rsin(θ))rdrdθ.
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To celebrate the holiday season this year, the Gaylord Texan has created an extreme eight-lane, tubing hill
with real snow called the "Kung Fu Panda Awesome SNOW Tubing Ride." The cost of each ticket for one day
is $21. This can be modeled by the function f(x) = 21x. The number of tickets purchased by groups is given
by the domain (4, 6, 103. which would be a reasonable range for the total cost of the tickets the groups
would pay?
The reasonable range for the total cost of the tickets the groups
would pay is {84, 126, 2163}.
What is Domain and Range?The sets of all the x-coordinates and all the y-coordinates of ordered pairs, respectively, are the domain and range of a relation.
A function's domain and range are its constituent parts. A function's range is its potential output, whereas its domain is the set of all possible input values.
Given:
The Function modeled for the situation is
f(x) = 21 x where x is the number of tickets sold.
So, For x= 4 Tickets
Fare, F(x) = 21 x 4= $84
and, For x= 6 Tickets
Fare, F(x) = 21 x 6 = $126
and, For x= 103 Tickets
Fare, F(x) = 21 x 103 = $2163.
Hence, the range is {84, 126, 2163}.
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The temperature of a liquid in an experiment starts at 0 degrees Celsius. The experiment calls for the temperature of the liquid to change at a rate of –0.6 degree Celsius per minute.
How long will it take for the liquid to reach –10.5 degrees Celsius? pls answer quick
Answer:
17.5 or 17 minutes and 30 seconds
Step-by-step explanation:
Given the functions, g(x), graphed below and f(x)=√x+1-3. Which statement about the functions is true?
f(x) and g(x) are both even functions.
Only g(x) is an even function.
f(x) and g(x) are both odd functions.
Only f(x) is an odd function.
Put the value where the variable is, read the graph, and do the arithmetic.
g(2) = 3f(2) -2 = 3(-1) -2
g(2) = -5
What does a variable mean?In a mathematics problem or experiment, a variable is a quantity that can change. To indicate a variable, we often use a single letter. Generic symbols used frequently for variables include the letters x, y, and z.
In the example, what is the variable?A trait that is measurable and capable of taking on several values is known as a variable. There are many variables, including height, age, wealth, province of birth, academic standing, and kind of dwelling. Two categories—categorical and numeric—can be used to categorize variables.
Here,
Given : f(x)=√x+1-3
for odd ,
f(-x) = √-x+1-3
f(-x) ≠ -f(x)
Thus it is not odd function.
f(x) is an even function.
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Solve the systems of equations: 3x+2y=4
-2x+2y=24
Please show work for how you solved for x and y
Answer:
The solution to the system of equations is x = 28, y = -40.
Step-by-step explanation:
To solve a system of equations, we need to find values for the variables that will make both equations true.One way to do this is to eliminate one of the variables by making the coefficients equal and opposite, then solve for the remaining variable.For example, in this system of equations, we can eliminate the y variable by adding the two equations together:3x + 2y = 4
-2x + 2y = 24
---------
x = 28
Now that we have an equation in terms of x, we can substitute this value back into either of the original equations to solve for y. Let's substitute it into the first equation:3x + 2y = 4
3(28) + 2y = 4
84 + 2y = 4
2y = -80
y = -40
the solution to the system of equations is x = 28, y = -40.
A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. The total volume of the solid is 14 cubic centimeters. Find the radius of the cylinder that produces the minimum surface area.
The radius of the cylinder that produces the minimum surface area is 1.34cm and this can be determined by using the formula area and volume of cylinder and hemisphere.
A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder.
The total volume of the solid is 10 cubic centimeters.
The volume of a cylinder is given by:
V = πr²h
The total volume of the two hemispheres is given by:
V = 2 x 2/3 πr³
Now, the total volume of the solid is given by:
V total = πr²h + 2 x 2/3πr³
Now, substitute the value of the total volume in the above expression and then solve for h.
10 = πr²h + 4/3πr³
h = 10/πr² + 4r/3
Now, the surface area of the curved surface is given by:
A = 2πrh
Now, the surface area of the two hemispheres is given by:
A' = 2 x 2πr²
A' = 4πr²
Now, the total area is given by:
A total = 2πrh + 4πr²
Now, substitute the value of 'h' in the above expression.
A total = 2πr(h = 10/πr² + 4r/3) + 4πr²
Simplify the above expression.
dA = -20/r + 4πr²/3
Now, differentiate the total area with respect to 'r'.
dA/dr = 20/r + 8πr/3
Now, equate the above expression to zero.
0 = -20/r² + 8πr/3
Simplify the above expression in order to determine the value of 'r'.
8πr³ = 60
r = 1.34 cm
Therefore, the radius of the cylinder that produces the minimum surface area is 1.34cm
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When two variables are not correlated at all, the correlation coefficient would be _______. a. -1 b. 0 c. 1 d. -2 e. 0.5
Answer:
B. 0
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Find a linearization at a suitably chosen integer near a at which the given function and its derivative are easy to evaluate. f(x) =3x^2 + 2x - 3, a = - 0.9 Set the center of the linearization as x = L(X) =
The linearization of the given function near x = -0.9 is approximated by the linear equation -x - 7, with the center of the linearization at x = -1. This equation is obtained by evaluating the function and its derivative at x = -1, then using them to approximate the value of the function at x = -0.9.
The linearization of the given function f(x) = 3x^2 + 2x - 3 near the point x = -0.9 is a linear equation that approximates the value of the function at the point. To obtain the linearization, we must first choose a suitable integer near -0.9 at which the function and its derivative are easy to evaluate. In this case, we choose x = -1 as the center of the linearization. To obtain the linearization equation, we evaluate the function and its derivative at x = -1, then use them to approximate the value of the function at x = -0.9. This results in the linear equation -x - 7. This equation allows us to approximate the value of the function at x = -0.9 without having to calculate the value of the function directly.
f(-1) = 6
f'(-1) = -1
Linearization: f(x) ≈ f(-1) + f'(-1)(x + 1)
= 6 - 1(x + 1)
= -x - 7
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a brokerage firm keeps track of the total money spent on tesla stocks by their clients each day of the week, t(t). the function t(t) can be expressed as t(t)
The function t(t) can be expressed as t(t) = xt where x refers the number of stocks and t refers the number of days.
In math, the term function refers an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
Here we have given that a brokerage firm keeps track of the total money spent on tesla stocks by their clients each day of the week, t(t).
And we need to find the function t(t) can be expressed.
While we looking into the given question, we have identified the that the function that represents the situation is written as t(t).
In this one t refers the number of days in the week they spend on the tesla stocks.
And here let us consider x be the number of stocks did the a brokerage firm keeps track.
So, the resulting function is written as,
=> t(t) = xt.
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A rocket motor is manufactured by bonding together two types of propellants, an igniter and a sustainer. The shear strength of the bond (y) is thought to be a linear function of the age of the propellant (X) when the motor is cast. Twenty observations are shown in the following table.
A) find the least squares estimated of the slope and intercept in the linear regression model
B) find the estimate of (?^2)
C) estimate the mean shear strength of a motor made from propellant that is 20 weeks old
A- The fitted line or the fitted linear regression model is:[tex]y=2625.385462-36.96179663*x[/tex]
B- [tex]s^{2} = 9811.21237[/tex]
C- [tex]y_{20} = 1886.14953[/tex]
A fundamental and widely used form of predictive analysis is linear regression. Regression analysis' main goal is to look at two things: (1) Is it possible to accurately forecast an outcome (dependent) variable using a set of predictor variables? (2) Which individual variables—as shown by the size and sign of the beta estimates—are highly important predictors of the outcome variable, and how do they affect the outcome variable? The link between one dependent variable and one or more independent variables is explained using these regression estimations.
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according to carfax, the value of a new vehicle can drop by 20 percent after the first 12 months of ownership. then, for the next four years, you can expect your car to lose roughly 10 percent of its value annually. use the depreciation rates listed by carfax to find the value of a brand new ford f-150 valued at 63,580 after 5 years. round to the nearest dollar.
The value of the brand new Ford F-150 after five years is approximately 32,435 dollars. Rounded to the nearest dollar, the value of the Ford F-150 after five years is 32,000 dollars.
The value of a new vehicle after the first 12 months of ownership is given by the equation:
value after 12 months = value at time of purchase × (1 - depreciation rate)
In this case, the value of the vehicle at the time of purchase is 63,580, and the depreciation rate is 20%. Plugging these values into the equation gives us:
value after 12 months = 63,580 × (1 - 0.20) = 50,864
The value of the vehicle after five years is given by the equation:
value after 5 years = value after 12 months × [tex](1 - depreciation rate)^n[/tex]
where n is the number of years after the first 12 months of ownership. In this case, n is 4 (5 years - 1 year).
Plugging the values for the value after 12 months, the depreciation rate, and n into the equation gives us the following:
value after 5 years = 50,864 × [tex](1 - 0.10)^4[/tex] = 32,435
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Solve for interior angles
Answer:
(x+17)°=25° <---Smallest Angle
(7x-16)°=40°
115°=115°
Step-by-step explanation:
Because the angles in a triangle add up to 180°, 115°+(x+17)°+(7x-16)°=180°
Now we can solve algebraically.
115°+(x+17)°+(7x-16)°=180°
115+x+17+7x-16=180
Rearrange:
115+17-16+7x+x=180
Solve:
115+1+8x=180
116+8x=180
8x=180-116
8x=64
x=8
Now we can fill x in to find the measure of the angles.
(x+17)°
(8+17)°
=25°
(7x-16)°
56-16
=40°
Check:
40+25+115
65+115
5+175
=180°, so our angles add up.
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Abdel wants to spend $12 on beans and rice.
- beans, b, cost $5 per pound.
- rice, r, cost $2 per pound.
Answer:
1. 2 pounds of beans and 1 pound of rice
2. 0.6 pounds of beans and 9 pounds of rice
3. b pounds of beans and (12-b)/2 pounds of rice
Step-by-step explanation:
1. You know that 2 pounds of beans costs 2*5 so $10. Then you subtract 12-10 to get 2.
2 pounds of rice
2. You multiply 0.6 by 5, and then you subtract that from 12, getting 9. then you divide by 2 (cost of rice per pound) getting 4.5 pounds of rice
if two dice are rolled one time, find the probability of getting these results a sum of greater than or equal to 11
for two dices, there are 36 possible combinations, the probability of getting these results a sum of greater than or equal to 11 is 3/36 = 12
What is probability and example?
Example: toss a coin 100 times, how many Heads will come up? Probability says that heads have a ½ chance, so we can expect 50 Heads. But when we actually try it we might get 48 heads, or 55 heads ... or anything really, but in most cases it will be a number near 50.
The only way to get 11 or more is getting 5 with one dice and 6 with another or getting 6 with both dices.
Therefore, there are only three combinations that satisfy this condition: (5,6), (6,5), and (6,6).
Since, for two dices, there are 36 possible combinations, the probability is 3/36 = 12
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Line 1 passes through the points (-20, -4) and (-11,-4).
Line 2 is perpendicular to Line 1 and passes through the
point (-17, -14).
What is the equation of Line 2?
something noteworthy is that, the y-coordinate for Line 1 is the same, well that simply means that Line 1 is a horizontal line, anything perpendicular to a horizontal line is simply a vertical line, Check the picture below.
Find the area of a regular 12-gon inscribed in a unit circle.
The required area of the regular 12-gon is obtained as 3 square units.
What is a regular polygon?A regular polygon can be defined as a polygon having all of its sides and angles equal to one another. The expression for each angle of a regular polygon is 180(n - 2)/n.
The angle between two sides of regular 12-gon is given as below,
180(12 - 2)/12 = 150°.
Now, the area of regular 12-gon is equivalent to the area of sum of 12 triangles.
The angle for the triangle will be 150/2 = 75°.
The diagram for such a triangle is given as below,
Now, OC = 1 × Sin B
⇒ OC = Sin 75°
And, BC = 1 × Cos B
⇒ BC = Cos 75°
Then, AB = 2BC = 2Cos 75°
Area of the triangle is given as,
1/2 × base × height
⇒ 1/2 × Sin 75° × 2Cos 75°
⇒ 0.25
Now, the area of the regular 12-gon inscribed in a unit circle is given as,
12 × 0.25 = 3 square units.
Hence, the area of a regular 12-gon inscribed in a unit circle is 3 square units.
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find a recurrence relation an that counts the number of ways to climb n stairs if you can take either 1 star or 3 strais at a time
The recurrence relation an = an-1 + an-3 counts the number of ways to climb n stairs if you can take either 1 stair or 3 stairs at a time.
What is a recurrence relation?
A recurrence relation is an equation that defines a sequence of values in terms of the preceding terms of the sequence. It is a mathematical tool used to define a sequence of numbers, functions, or other mathematical objects in a recursive manner.
To find a recurrence relation that counts the number of ways to climb n stairs if you can take either 1 star or 3 stairs at a time, we can use the following steps:
Identify the base cases. In this case, the base cases are the number of ways to climb 0 stairs (an = 1) and the number of ways to climb 1 stair (an = 1).
Determine the recurrence relation. For n > 1, the number of ways to climb n stairs is equal to the number of ways to climb n-1 stairs (taking 1 stair at a time) plus the number of ways to climb n-3 stairs (taking 3 stairs at a time). Therefore, the recurrence relation is:
an = an-1 + an-3
Use the base cases and the recurrence relation to determine the values of an for the desired range of n.
For example, to determine the values of an for n = 0, 1, 2, 3, 4, and 5, we can use the following table:
n | an
0 | 1
1 | 1
2 | an-1 + an-3 = 1 + 1 = 2
3 | an-1 + an-3 = 2 + 1 = 3
4 | an-1 + an-3 = 3 + 2 = 5
5 | an-1 + an-3 = 5 + 3 = 8
Hence, the recurrence relation an = an-1 + an-3 counts the number of ways to climb n stairs if you can take either 1 stair or 3 stairs at a time.
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A consumer group claims that the mean annual consumption of high fructose corn syrup by a person in the United States is 48.8 pounds. A random sample of 120 people in the United States has a mean annual high fructose com syrup consumption of 49.5 pounds. Assume the population standard deviation is 3.6 pounds. At alpha = 0.05, can you reject the claim? Identify the null and alternative hypotheses. Identify which hypothesis is the claim. Use the sample statistics given to find the standardized test statistics: z and P. Make a decision to reject or fail to reject the null hypothesis. Interpret your decision in the context of the original claim.
the result we get is statistically significant. We reject the null hypothesis.
The null hypothesis in the given question is 'the mean annual consumption of high fructose corn syrup by a person in the United States is 48.8 pounds' and the alternative hypothesis in the given question is 'the population standard deviation is 3.6 pounds.'
Population mean = 48.8 pounds
Sample size = 120
Sample mean = 49.5 pounds
Population standard deviation = 3.6
α = 0.05
The standardized statistic z is:
z = (Sample mean - Population mean) x (√n / standard deviation)
z = (49.5 - 48.8) x (√120/3.6)
z = 2.13
The standardized statistic P is:
P = 2 - 2 x Φ(z)
P = 2 - 2 x 0.983
P = 0.034
Since, the result we get is statistically significant. We reject the null hypothesis.
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