06/27/23

A design consists of three squares placed side by side. The area of each square is 50 square centimeters. To the nearest tenth of a centimeter, what is the perimeter of the design?
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06/27/23

Doug's height was 5 feet. The next year Doug was 5 feet 4 inches tall. What is the percent increase?
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04/30/23

For which values of a and b does the system have a unique solution?
Given the system of equationsx+z=3ax+y=23x + y + bz = 7
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04/25/23

Linear algebra Eigens
Find a 2x2 matrix A for which E-5 = span {[-3,1]} , E-4 = span {[5,-2]}Where Eλ denotes the eigenspace associated with the eigenvalue λ.
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02/02/23

Use the function to find the image of v and the preimage of w. T(v1, v2) = 2 2 v1 − 2 2 v2, v1 + v2, 2v1 − v2 , v = (1, 1), w = (−7 2 , −2, −22)
Use the function to fine the image of v and the preimage of wT(v1, v2) = (((sqrt(2)/2)v1) - ((sqrt(2)/2)v2), v1+v2, 2v1-v2) , v = (1,1), w = (-7 sqrt(2), -2, -22)
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01/20/23

Solve the following deifferential equations by using the method of undetermined coefficients
d4y/dx4 - 2 d3y/dx3- 15 d2y/dx2+36 dy/dx=3+36x
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01/20/23

Use the method of variation of parameters to solve the differential equation
d2y/dx2+9y=cosec2(3x).
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01/17/23

...for what value(s) of x is g(f(x)) undefined? Explain by making reference to the algebraic properties

If f(x) = log x – 4 and g(x) = , for what value(s) of x is g(f(x)) undefined? Explain by making reference to the algebraic properties.Grade 12 Advanced FunctionsPlease answer clearly and neatly.... more
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07/06/22

Find the general solution of the differential equation.
Find the general solution of the differential equation.y''' - 5y'' - 25y' +125y = 0Note = Use c1, c2, and c3 for arbitrary constants.y(t) =
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04/07/22

Consider two subsets P and Q of a universal set U. Given that n(U) = 104, n(P) = 63, n(P'∩Q) = 28 and n(P∩Q) = 16, find: (a) n(Q)
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01/11/21

A credit union client deposits $3,400 in an account earning 9% interest, compounded annually. What will the balance of the account be at the end of 36 years?
Balance $__________  after 36 years.
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01/11/21

The temperature of a roast varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T minus A , where T is the water temperature...
The temperature of a roast varies according to Newton's Law of Cooling:  , where T is the water temperature, A is the room temperature, and k is a positive constant.If a room temperature roast... more
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11/18/20

Calculate the test statistic
Biologists researching the effects of adding limestone sand as buffer for acid rain effects in streams monitored the pH levels of two streams each month for 36 months. The first stream had a mean... more
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08/06/20

The region bounded by the given curves is rotated about the specified axis. Find the volume of the resulting solid by any method
x = 1 − y4    x = 0,     about the line x = 9
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07/07/20

an urn contains 8 orange balls and 7 green balls. If 7 balls at random are chosen what is probability that he will select 3 orange balls and 4 green

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04/24/20

Finding the Formula for a Polynomial
The polynomial of degree 3, P(x), has a root of multiplicity 2 at x=3 and a root of multiplicity 1 at x=−3. The y-intercept is y=−2.7.
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04/23/20

How to solve this
Find the distribution function for above exercise. Recall that the density functions of above exercise is f (x) =C(4x −2x2), 0<x <2 0, otherwise
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04/06/20

What is the probability that the test result is correct?
A device tests whether each light on a string of LED lights is functioning properly. A company estimates that 2.3% of LED lights that they produce are defective. The device is 96% accurate for... more
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11/20/19

The half-life of carbon-14 is 5600 years if a piece of charcoal made from the word of a tree shows only 77% of the carbon 14 expected in living matter when did the tree die?
The half-life of carbon-14 is 5600 years if a piece of charcoal made from the word of a tree shows only 77% of the carbon 14 expected in living matter when did the tree die?
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11/17/19

Pre Calculus Hyperbola Question
The sides of a nuclear power plant cooling tower form a hyperbola. The diameter of the bottom of the tower is 319 feet. The smallest diameter of the tower is 185 which is 380.5 feet above the... more
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10/19/19

Show that the integral from 1 to infinity of 1/(1+x^2) equals the integral from 0 to 1 of 1/(1+t^2) using the substitution t = 1/x
Show that the integral from 1 to infinity of 1/(1+x^2) equals the integral from 0 to 1 of 1/(1+t^2) using the substitution t = 1/x
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R

09/26/19

Rotating x axis labels in R for barplot?
I am trying to get the x axis labels to be rotated 45 degrees on a barplot with no luck. This is the code I have below: barplot(((data1[,1] - average)/average) * 100, srt = 45, ... more
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09/23/19

A particular fruit's weights are normally distributed, with a mean of 767 grams and a standard deviation of 15 grams. The heaviest 16% of fruits weigh more than how many grams?
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09/22/19

Calculus Question
4.MOBILE INSTANT MESSAGING ACCOUNTS—Mobile instant messaging (IM) is a small portion of total IM usage, but it is growing sharply. The function𝑃(𝑡)=.257𝑡^2+0.57𝑡+3.9 (0≤𝑡≤4)gives the mobile IM... more
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09/19/19

Three shoppers from the survey are selected at random, one at a time without replacement. What is the probability that none of the three shoppers purchased office supplies?
An internet research company surveyed 95 online shoppers, each of whom made one purchase today. The company recorded the type of purchase each shopper made. Here is a summary.Type of purchase ... more
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