Suppose that the number of mosquitoesN(in thousands) in a certain swampy area near a community is related to the number of pounds of insecticidexsprayed on the nesting areas according to 
Find the rate of change ofN,with respect toxwhen 49 pounds of insecticide are used. Round your answer to two decimal places.
?
A. 0.56
B. 0.18
C. 0.38
D. -0.57
E. -0.20
Answer: E
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Factor the polynomial completely. If the polynomial is prime, so state.-75x3 - 130x2 - 40x
A. x(3x + 4)(-25x - 10) B. -5(3x2 + 4)(5x + 2) C. -5x(3x + 4)(5x + 2) D. x(-15x - 20)(5x + 2)
Draw a sketch to represent each of the following vectors. Refer to the vectors pictured here.
d - a
A. 
B. 
Solve the problem.The function f(x) = 1 + 1.6 ln (x + 1) models the average number of free-throws a basketball player can make consecutively during practice as a function of time, where x is the number of consecutive days the basketball player has practiced for two hours. After how many days of practice can the basketball player make an average of 6 consecutive free throws?
A. 78 days B. 22 days C. 24 days D. 80 days
Find the equation of the line described, and express your answer in the specified form.Parallel to the line x = 4; passes through the point (5, 6); standard form
A. y = 4 B. y = 6 C. x = 5 D. x = 6