Build a variable expression for the given phrase.Eight times a number
A. 8 - x
B. 8x
C. 
D. 8 + x
Answer: B
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Determine if the given polar coordinates represent the same point.(3, ?/4), (-3, ?/4)
A. Yes B. No
Evaluate the integral.
cos 5? d?
A. 
sin 5? - 
sin 3? - 
sin 7? + C
B. 
sin 3? - 
sin 5? - 
sin 7? + C
C. 
sin 5? - 
sin 7? - 
sin 3? + C
D. 
sin 5? - 
sin 3? - 
sin 7? + C
Write the expression in the standard form a + bi.
A. - 
+ 
i
B. - 
- 
i
C. 
- 
i
D. 
+ 
i
Solve the problem.The function f(t) = -0.14t2 + 0.5t + 30.9 models the U.S. population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.54t2 + 11.69t + 107 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function 
represent? Find 
(5).
A. Cost per person in thousands of dollars. $0.17 thousand B. Cost per person in thousands of dollars. $0.21 thousand C. Cost per person in thousands of dollars. $5.98 thousand D. Cost per person in thousands of dollars. $11.99 thousand