Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 
D. (x + 9)(x - 7)
Answer: A
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Find the common ratio for the geometric sequence.4, 16, 64, 256, 1024, ...
A. 1/4 B. 256 C. 4 D. 16
Find the exact value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.Find cos ?.
A. 
B. 
C. 
D. 
Solve the problem.The approximate rate of change in height of a certain shrub in a nursery is given by 
where the height is measured in inches and x represents the number of years since the shrub was planted. After 2 years, the shrub was 18 inches tall. Find the function that gives the height of the shrub x years after it was planted. Assuming that the shrub will be sold when it is 6 years old, approximate its height when it is sold.
A. f(x) = 
+ 
; 20.9 inches
B. f(x) = 13 ln
+ 18; 41.3 inches
C. f(x) = 13 ln
+ 9.0; 32.3 inches
D. f(x) = 13 ln
+ 18; 36.0 inches
Solve.Joytown has a present population of 40,000 and the population is increasing by 2.5% each year. How long will it take for the population to double? Round your answer to the nearest year.
A. 28 years B. 29 years C. 41 years D. 40 years