Cracking The Ap Calculus ab Exam 2018

(B)2.159

(C)2.408

(D)8.636

38. 
    

    cos(t)dt    =

    
    

(A)sin  3x

(B)cos  3x

(C)3    sin 3x

(D)3    cos 3x

39.Find the average value of f(x) = 4cos(2x) on the interval from x = 0 to x = π.

(A)−

(B) 0

(C)

(D)

40.The radius of a sphere is increasing at a rate proportional to itself. If the radius is 4 initially, and the
radius is 10 after two seconds, what will the radius be after three seconds?

(A)62.50

(B)15.81

(C)16.00

(D)25.00

41.Suppose f(x) = (t^3 + t) dt. Find f′(5).

(A) 130

(B) 120

(C) 76

(D) 74