Use  the position equation  , where represents the height of an object (in feet), 

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A projectile is fired straight upward from ground level  with an initial velocity of  176 feet per second. At what instant will it be back at ground level?

?



A.  Sec
B.  Sec
C.  Sec
D.  Sec
E.  Sec

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Answer: A

Mathematics

Find the derivative of the function.f(x) = cos 

A. f '(x) = 
B. f '(x) = 
C. f '(x) = - sin  
D. f '(x) = - sin 

Solve the problem.The function V(r) = 4?r2 describes the volume of a right circular cylinder of height 4 feet and radius r feet. Find the instantaneous rate of change of the volume with respect to the radius when r = 11. Leave answer in terms of 

A. 44? cubic feet per feet B. 8? cubic feet per feet C. 88? cubic feet per feet D. 22? cubic feet per feet

The graph of the derivative ? of  is shown. Compute the total change of

style="font-size:14.6667px;vertical-align:middle;" /> over the interval .
?
?
?

A.
B. ?
C. ?
D. ?
E. ?

Find the reciprocal, if it exists.- 

A.   
B. -  
C.  
D. 1