Cracking the ACT Premium Edition with 8 Practice Tests, 2018 by Princeton Review

Author:Princeton Review
Language: eng
Format: epub
Publisher: Random House Children's Books
Published: 2018-01-23T05:00:00+00:00

42. The table below gives the values of f(x) for selected values of x in the function f(x) = (x + 4)2 – 1, where x and y are both real numbers.

x f(x)

–7 8

–5 0

–3 0

–1 8

0 15

1 24

For the equation above, which of the following values of x gives the greatest value of f(x) ?

F. –4

G. –5

H. –6

J. –7

K. –8

43. The volume of the right circular cylinder shown below is 64π cubic inches. If its height is 4 in., what is its radius in inches?

A. 2

B. 4

C. 8

D. 10

E. 16

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