Solve the problem.City A is 452 miles due north of of City B. Find the difference in the latitudes of these two cities, assuming that the radius of Earth is 3960 miles.
A. ?11.414°
B. ?20.545°
C. ?7.889°
D. ?6.540°
Answer: D
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Solve the problem.Note that 
From this, we might conjecture that 12 + 12 + 22 + ... + 
= FN × y where y =
A. FN-1. B. 13. C. FN. D. FN+1. E. none of these
Set up the percent proportion for the application problem. Do not try to solve for any unknowns.There are 120 quarts of grape juice in a vat holding a total of 3000 quarts of fruit juice. What percent is grape juice?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
The function f is one-to-one. Find its inverse.f(x) =
A. f-1(x) = x + 2
B. f-1(x) = 
C. f-1(x) = x3 + 2
D. f-1(x) = x3 + 4
A geometric sequence is given. Find the common ratio and write out the first four terms.{sn} = 
A. an = 6 
n-1
r = 
; s1 = 6, s2 = 3, s3 = 
, s4 = 
B. an = 6 ? (2)n-1
r = 2; s1 = 6, s2 = 12, s3 = 24, s4 = 48
C. an = 
(6)n-1
r = 
; s1 = 6, s2 = 12, s3 = 24, s4 = 48
D. an = 6 
n-1
r = 
; s1 = 6, s2 = 
, s3 = 
, s4 = 