Simplify the expression. Assume that all variables represent nonnegative real numbers.2
- 7
A. 19
B. -5x
C. -23
D. -19
Answer: D
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Find the number of subsets.{1, 2, 3, . . . , 8}
A. 16 B. 252 C. 256 D. 512
Find the inverse of the one-to-one function.f(x) = (x - 4)3
A. f-1(x) = 
- 4
B. f-1(x) = 
+ 4
C. f-1(x) = 
+ 4
D. f-1(x) = 
+ 64
Use the Intermediate Value Theorem to determine whether the polynomial function has a zero in the given interval.f(x) = 5x3 + 5x2 - 3x + 3; [-2, -1]
A. f(-2) = -11 and f(-1) = -6; no B. f(-2) = 11 and f(-1) = -6; yes C. f(-2) = -11 and f(-1) = 6; yes D. f(-2) = 11 and f(-1) = 6; no
You are holding one of the tethers attached to the top of a giant character balloon in a parade. Before the start of the parade the balloon is upright and the bottom is floating approximately 20 feet above ground level. You are standing approximately a = 130 feet ahead of the balloon (see figure).
?
?
Find an expression for the angle of elevation from you to the top of the balloon.
?
A. 
B. 
C. 
D. 
E. 