?Find the x-values of all relative maxima of the given function.
?
?
?

A. ?
B. ?
C. ?
D. ?
E. ?no relative maxima

Answer: D

Mathematics

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A. - 3840
B. - 
C. - 1280
D. - 640

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Solve the problem.The amount of a radioactive substance present, in grams, at time t in months is given by the formula  Find the number of grams present in 2 years. If necessary, round to three decimal places.

A. 54.409 B. 527.803 C. 5278.032 D. 5.441

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Evaluate the expression. - 

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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.

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