Use a calculator to evaluate the function. Round your answer to 4 decimal places.cos 
A. 0.9999
B. 0.9397
C. 0.4083
D. 0.3420
Answer: B
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Solve the problem.The function A = A0e-0.0077x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 800 pounds of the material are placed in the vault, how much time will need to pass for only 588 pounds to remain?
A. 45 years B. 80 years C. 40 years D. 50 years
Solve.Using the first three terms of the appropriate Taylor expansion, find the area bounded by the curve 
and 
A. 0.4779 B. 0.6758 C. 0.1352 D. 0.8277
Verify the identity.
= csc ? cot ?
What will be an ideal response?
Graph the function in a viewing window that shows all of its extrema and x-intercepts.f
= -x3 + 4x2 - 17x + 30
A. 
B. 
C. 
D. 