Solve the problem.The function f(t) = -0.15t2 + 0.53t + 30.4 models the U.S. population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.56t2 + 12.6t + 105.6 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function 
represent? Find 
(10).
A. Cost per person in thousands of dollars. $0.07 thousand
B. Cost per person in thousands of dollars. $0.18 thousand
C. Cost per person in thousands of dollars. $8.97 thousand
D. Cost per person in thousands of dollars. $13.89 thousand
Answer: D
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Decide whether the pair of lines is parallel, perpendicular, or neither.The line through (-10, 2) and (-18, 12) and the line through (-4, 10) and (-8, 15)
A. Neither B. Parallel C. Perpendicular
Integrate the given expression.
dx
A. 14x + C
B. 
x3 + x + C
C. 
x3 + C
D. x + C
Solve the problem.A pendulum is released and swings until it stops. If it passes through an arc of 35 inches the first pass, and if on each successive pass it travels 
the distance of the preceding pass, how far will it travel before stopping?
A. 210 in. B. 175 in. C. 140 in. D. 315 in.
Solve.310 - 2x = 9
A. 3 B. 4 C. -4 D. 5