Solve the problem.The population of a particular city is increasing at a rate proportional to its size. It follows the function 
where k is a constant and t is the time in years. If the current population is 12,000, in how many years is the population expected to be 30,000? (Round to the nearest year.)
A. 88 yr
B. 7 yr
C. 8 yr
D. 15 yr
Answer: D
Mathematics
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Find f(x) at the indicated value of x.f(x) = -4x2 + 7x - 8, x = 4
A. -44 B. -48 C. 4 D. -54
Mathematics
Evaluate the function at the given value of the independent variable and simplify.g(x) = 2x + 4;g(x - 1)
A. 2x + 4
B. 2x + 2
C. 2x + 1
D. 
x + 4
Mathematics
Add. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Factor.25k3m + 70k2m2 + 49km3
A. km(5k - 7m)2 B. km(5k + 7m)2 C. km(5k + 7m)(5k - 7m) D. Prime
Mathematics