Solve.Three times the sum of a number and 2 is 21 less than the number times 6. Find the number.
A. -9
B. 27
C. -27
D. 9
Answer: D
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Solve the problem.Find an upper bound for 
in estimating 
with n = 6 steps.
A. 
B. 
C. 
D. 
Evaluate.
- 
A. - 
B. 
C. - 
D. 
Solve the problem.Suppose that a radio transmission pattern can be modeled by 
for 
where the units are miles. Determine the predominant direction(s) of transmission and the distance(s) of transmission in such direction(s). Assume that the positive 
points east.
A. Northeast and southwest; 80 miles B. Northeast; 80 miles C. Northeast and southwest; 6400 miles D. North and south; 80 miles
Find the inverse of the function, and state the domain and range of the inverse function.f(x) = 5 cos (2x) + 8 for 0 ? x ? 
A. f-1(x) = 
cos-1 
; domain = [3, 13]; range = 
B. f-1(x) = 
cos-1 
; domain = [-13, 13]; range = 
C. f-1(x) = 
cos-1 
; domain = [3, 13]; range = 
D. f-1(x) = 
cos-1 
; domain = [3, 13]; range = 