Find the perimeter of the figure.
A. 113 m
B. 95 m
C. 100 m
D. 84 m
Answer: A
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Find the center of mass of a thin plate of constant density covering the given region.The region between the x-axis and the curve y = 6csc2 x, 
? x ? 
A. 
= 
, 
= 8
B. 
= 
, 
= 4
C. 
= 
, 
= 9
D. 
= 
, 
= 6
Solve the problem.Hsien-Ta doesn't trust banks, so his savings are hidden under his mattress. Emilia has her savings in an investment at simple interest. In approximately what year did they have the same amount?
A. 1989 B. 1986 C. 1988 D. 1996
Solve the problem.Suppose that the number of inhabitants of Country A is given by 
million, and the number of inhabitants of Country B is given by 
, where x is the number of years since 2010. Find the year in which the number of inhabitants of Country A equals the number of inhabitants of Country B.
A. 2026 B. 2024 C. 2020 D. 2022
Find all solutions to the equation. Express your answer in degrees.sec2 t + 2 tan t = 0
A. 135° + 180°? n B. 45° + 180°? n C. 45° + 360°? n D. 135° + 90°? n