Solve the problem.A circular oil slick spreads so that as its radius changes, its area changes. Both the radius r and the area A change with respect to time. If dr/dt is found to be 3.5 m/hr, find dA/dt when r = 22.2 m.
A. 310.8? m2/hr
B. 38.85? m2/hr
C. 77.7? m2/hr
D. 155.4? m2/hr
Answer: D
Mathematics
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Determine convergence or divergence of the series.
A. Converges B. Diverges
Mathematics
Solve the problems.After spending $3,050 for tables and $2,250 for chairs a convention center manager finds that the furniture cost 3% more than last year. Find the amount that he spent last year on tables and chairs. Round your answer to the nearest dollar.
A. $5,464 B. $159 C. $5,146 D. $2,320
Mathematics
Determine the given complex number raised to a power and write the answer in rectangular form.(1 + i)20
A. -1024i B. 1024 C. -1024 D. 1024i
Mathematics
Prove the identity.
+ 
= 2 csc x
What will be an ideal response?
Mathematics