Factor completely.x2 + 2xy - 8y2 = (x + 4y)( 
)
A. x + y
B. x - 2y
C. x + 2y
D. x - 2y2
Answer: B
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Solve the problem.A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by 
where x is the number of days since the start of the job. Find the expenditure if the job takes 3 days.
A. $4100 B. $41 C. $7800 D. $78
Provide an appropriate response.Use a calculator to graph the function f to see whether it appears to have a continuous extension to the origin. If it does, use Trace and Zoom to find a good candidate for the extended function's value at x = 0. If the function does not appear to have a continuous extension, can it be extended to be continuous at the origin from the right or from the left? If so, what do you think the extended function's value(s) should be? f(x) = 
A. continuous extension exists at origin; f(0) = 0 B. continuous extension exists at origin; f(0) = 3 C. continuous extension exists from the right; f(0) = 3 continuous extension exists from the left; f(0) = -3 D. continuous extension exists from the right; f(0) = 1 continuous extension exists from the left; f(0) = -1
The rate of growth of a population of N individuals is 
. Write an equation of change that is satisfied by N.
?
A. 
B. 
C. 
D. 
Find the second derivative.y = 4x2 + 6x - 5
A. 0 B. 4 C. 8x + 6 D. 8