02/15/16

statistics
the numbers a,b,8,5,7 have a mean of 6 and a variance of 2. find the values of a and b, if a>b.
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02/15/16

equation of the circle
Put the equation of the circle in standard form, identify the center (h,k) radius r of the circle. x2+y2-2x-12y+28=0
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02/14/16

[ (R*ST) + (U÷V) ] ÷ [ WX + (Y÷Z) ] = 50 use numbers 1 through 9 only once
using numbers from 1 to 9 in place of the letters, and only each number being used once, the end result is the answer equals 50.
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01/28/16

A tourist starts to walk up a mountain path that is 31 miles long at the rate of 4 miles per hour. After walking for a while, he gets tired and decides to get a
Please explain how you did the problem! I ouldnt fit the whole problem!   This is the rest of the question:   The taxi gets him to the top traveling at a constant speed of 50 mph. If the... more
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11/14/15

natural logarithms
Let f(x) = ln(ln(x)). Find f' (e4)
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10/06/15

Not getting correct answer on calculator
My formula is   Squareroot (40)(1366) - (206)^2   Over   (40)(39)   The correct answer should be 2.7970 and I am positive these are the right numbers. It looks like I am  just having... more
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10/05/15

The average diameter of sand dollars on a certain island is 4.50 centimeters with a standard deviation of 1.00 centimeters. If 16 sand dollars are chosen at ran
The average diameter of sand dollars on a certain island is 4.50 centimeters with a standard deviation of 1.00 centimeters. If 16 sand dollars are chosen at random for a collection, find the... more
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10/05/15

LOST AND CONFUSED
When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling... more
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10/04/15

A company is preparing to launch a new web site to sell its products. From past experience, they know that purchases at the site will occur as a Poisson process
A company is preparing to launch a new web site to sell its products. From past experience, they know that purchases at the site will occur as a Poisson process with on average 22 purchases every... more
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08/30/15

twelve coins consiting of nickles, dimes, quarters is worth $1.20. The number of dimes is two more than twice the number of nickles. How many nickles are there?
I have done so many of these but for some reason I cant figure a couple out, please help.
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08/30/15

subset selections
the subsets A⊂B⊂C of a universal set U, except assume that n(A)=5 and n(C)=10.   in how many different way can you select B if    1. n(B)=6   2. n(B)=7
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08/30/15

explain how many ways there are ! don't just put numbers
Danny connie and jane have 8 cookies to share among themselves.They decide that they each do not need to receive the same number of cookies,but each person should receive at least one cookie. if... more
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08/10/15

a bicyclist can make her bike move at 30 miles per hour. how many feet per second is this?
Change miles to feet abe hours to minutes to seconds
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08/04/15

confidence interval question
To ?nd µ, the average tra?c waiting time in a city I randomly sampled 40 spots. The 95% CI for average waiting time for my sample is (1.5, 2.1). Find out which of the following statements are... more
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07/28/15

Finding the standard deviation.
The probability that a radish seed will germinate is 0.7. A gardener plants seeds in batches of 17. Find the standard deviation for the number of seeds germinating in each batch.
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07/18/15

Solve x^4 + x^2 – 2 = 0. (MULTIPLE CHOICE)
Solve x4 + x2 – 2 = 0.   a. x = ±1 or x = ±ib. x = ±1 or x = i√2c. x = ±1 or x = ±2d. x = ±1 or x = √2   Choose one thanks
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07/18/15

Solve the equation in the real number system: 9x^3+9x^2-4x-4=0... (MULTIPLE CHOICE)
Solve the equation in the real number system: 9x3+9x2-4x-4=0   a. -3, -1, 3 b. -5, -1, 5 c. -1, -2/3, 2/3 d. -2/3, 2/3, 1   Choose one thanks
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07/12/15

Use the numbers 3,4,5, and 6 (each exactly once) together with the operations +,•, and / to create a numerical expression whose value is 22.
Use the numbers 3,4,5, and 6 (each exactly once) together with the operations +,•, and / to create a numerical expression whose value is 22.
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07/12/15

word problem
pastry chef lauren and her assistant chef mike are preparing fancy desserts for a banquet. the job would take mike working alone, 9 hours longer than it wouldtake lauren, working alone. working... more
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07/11/15

Five times the second of three consecutive even integers is six more than twice the sum of the first and third integers. Find the middle even integer.
This question has too much expression and can't figure out the middle integers because can't find it and when I try it it came out with a remainder
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