Solve the problem.In 1981, 
and 
had the same population. The population of 
continued to increase steadily, while the rate of population growth of 
(although initially less than that of 
) eventually overtook the growth rate
of City #2. The populations of two cities are modeled by the following equations: 
: 
; 
: 
, where 
corresponds to the year 1981. In what year after 1981 did the cities have the same population?
A. 1986
B. 1984
C. 1987
D. 1985
Answer: A
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State whether the function is a polynomial function or not. If it is, give its degree.f(x) = x5/4 - x6 + 2
A. Yes; degree 5/4 B. Yes; degree 5 C. Not a polynomial D. Yes; degree 6
Express as a difference of logarithms.log6 
A. log6 3 - log6 5 B. log3 5 - log3 3 C. log6 5 - log6 3 D. log6 5 + log6 3
Provide an appropriate response. An airport limo service charges riders a fixed charge of $18 plus $4.00 per mile. a. Write a cost function, 
, of riding in a limo for x miles.b. Write the average cost function, C, riding in a limo for x miles.c. How many miles must a rider go to have an average cost per mile of $4.90?
A. a. C(x) = 18 + 4x;
b. 
(x) = 
c. 20 mi
B. a. C(x) = 4 + 18x
b. 
(x) = 
c. 24.4 mi
C. a. C(x) = 4 + 18x
b. 
(x) = 
c. 45 mi
D. a. C(x) = 18 + 4x
b. 
(x) = 
c. 4.4 mi
Factor completely. If the polynomial is prime, then state this as your answer.-4r4 + 256r
A. -4r(r - 4)(r2 + 4r + 16) B. prime C. -4r(r + 4)(r2 - 4r + 16) D. -4r(r - 4)(r2 - 4r + 16)