Suppose That the Number of Mosquitoes N (In Thousands) in a Certain

Multiple Choice

Suppose that the number of mosquitoes N (in thousands) in a certain swampy area near a community is related to the number of pounds of insecticide x sprayed on the nesting areas according to Find the rate of change of N, with respect to x when 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