Determine whether the expression represents a difference of two squares.t3 - 121
A. Yes
B. No
Answer: B
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Use cylindrical coordinates to evaluate  figures 4.png)
where E is the region that lies inside the cylinder x² + y² = 25 and between the planes z = -6 and z = 5. Round the answer to two decimal places.
What will be an ideal response?
Show that the function is a solution of the wave equation.w(x, t) = cos (5t - 5cx), c ? 1
A. Yes B. No
Solve the problem.The voltage E in an electrical circuit is given by E = 5.9 cos 50?t, where t is time measured in seconds. Find the period.
A. 25
B. 
C. 
D. 25?
Solve the problem.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. By using linear regression, the following function is obtained: 
where x is number of hours studied and y is score on the test. Use this function to predict the score on the test of a student who studies 11 hours. Round to the nearest tenth.
A. 83.8 B. 84.1 C. 74.1 D. 79.1