Find the average of the list of numbers.87, 81, 73, 77, 87
A. 87
B. 81
C. 73
D. 80
Answer: B
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Solve the problem.The table shows the number of new cases (in thousands) of a certain disease diagnosed in a country in various years. 
Let f(t) be the number of new cases (in thousands) of the disease diagnosed at t years since 2010. Use a quadratic model to predict when the number of new cases of the disease diagnosed will be 53,700. (First find a quadratic equation for f in vertex form by using the data for the years 2013 and 2017).
A. 2021 B. 2019 C. 2020 D. 2022
Plot the point whose polar coordinates are given.
A. 
B. 
C. 
D. 
Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = 
A. - 
; - 
B. - 
; - 
C. 
; 
D. 
; 
Factor completely. If the polynomial is prime, state so.x + 125x4
A. x(1 + 5x)(1 - 5x + 25x2) B. x(1 - 5x)(1 + 5x + 25x2) C. prime D. x(1 + 5x)(1 + 5x + 25x2)