Solve the problem.Data for the amount of sun-induced expansion (in mm) of a steel I-beam were collected. The measurements are 7.82, 7.83, 7.70, 7.81, and 7.75. Find the standard deviation and variance for the data. Round the results to the nearest thousandth.
A. s = 0.045, v = 0.002
B. s = 0.111, v = 0.012
C. s = 0.139, v = 0.019
D. s = 0.002, v = 0.001
Answer: A
Mathematics
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Find the required quantity given the wire that lies along the curve r and has density ?.Moment of inertia Iz about the z-axis, where r(t) = (2 cos t)i + (2 sin t)j, 0 ? t ? 
; 
A. Iz = 32
B. Iz = 0
C. Iz = 8
D. Iz = 32
Mathematics
Factor out the GCF.80x9y7 - 48x3y4 + 80x5y2
A. 16(5x9y7 - 3x3y4 + 5x5y2) B. 16x3y2(5x6y5 - 3y2 + 5x2) C. 16x3(5x6y7 - 3y4 + 5x2y2) D. No common factor
Mathematics
Solve the problem.Gina is buying a used car that has an advertised price of 
. She is buying the car on credit and must make a down payment of 
and 24 monthly payments of 
. What is the total cost of the car?
A. $2616 B. $3116 C. $3106 D. $2716
Mathematics
Simplify.
A. 18
B. 10
C. 3
D. 6
Mathematics