Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, csc ? < 0Find cos (2?).
A. 
B. - 
C. 
D. 
Answer: B
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Solve the problem.Evaluate
where R is the interior of the ellipsoid 
. Hint: Let 
and then convert to spherical coordinates.
A. 90?2 B. 120? C. 120?2 D. 90?
The following data, compiled by the superintendent of schools in a large metropolitan area, shows the average SAT verbal scores of high school seniors during the 5 years since the district implemented its "back-to-basics" program. Year, x12345Average Score, y436438428430426? Determine the equation of the least-squares line for these data. Use the result obtained to predict the average SAT verbal score of high school seniors 2 years from now (x = 7). Please round your answer to the nearest whole number. ?
A. 
B. ?
C. ?
D. ?
Provide an appropriate response.A young family with two children has $40,000 saved for college costs, with part invested at 12% and part invested at 8%. If the total yearly income from the investments is $3400, how much is invested at each rate?
What will be an ideal response?
Change the exponential expression to an equivalent expression involving a logarithm.ex = 15
A. ln 15 = x B. logx e = 15 C. ln x = 15 D. log15 x = e