Multiply.(2x + 7)(2x + 7)
A. 2x2 + 27x + 49
B. 2x2 + 28x + 27
C. 4x2 + 49x + 28
D. 4x2 + 28x + 49
Answer: D
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Solve the problem.Consider the region R bounded by the graph of f(x) = 
on the interval [0, 5]. Find the volume of the solid formed when R is revolved about the x-axis.
A. 
B. 
C. 
+ 40
D. 
Express the integrand as a sum of partial fractions and evaluate the integral.
A. ln
+ C
B. 3ln
+ 4ln
+ C
C. 4ln
- 4ln
+ C
D. 3ln
+ 4ln
+ C
Solve.Suppose the number of Quickie hamburgers (in millions) served yearly can be modeled by 
Approximate how many years it takes for the number of hamburgers served to reach 107 million. Round to the nearest year.
A. 7 yr B. 9 yr C. 10 yr D. 8 yr
Solve the problem.If the rectangle below is a golden rectangle (with x as the shorter side), then the approximate value of x is
A. 89.
B. 55.
C. 34.
D. 89 
.
E. none of these