Paul is going to have the exterior of his home painted. painting usa charges $75.00 to come out and evaluate the house plus $25.00 per hour of labor. upscale home painting does not charge to evaluate the house. however, they charge $40.00 per hour.

if it takes 25 hours to paint paul’s house, the most cost effective company will be

Painting USA is the most cost effective company.

Step-by-step explanation:

Painting USA company charges:

$75.00 to evaluate the house

Plus, $25.00 per hour of labor.

Total number of hours taken to paint the house is 25 hrs

Total cost here = $75.00 + $25.00(25) = $700.00

Upscale Home Painting company charges:

$0.00 to evaluate the house

$40.00 per hour of labor.

Total number of hours taken to paint the house is 25 hrs

Total cost here = $0.00 + $40.00(25) = $1000.00

So Painting USA is the most cost effective company since it charges $700.00 which is less that Upscale Home Painting company's painting charges of $1000.00.

Painting USA

Step-by-step explanation:

They will charge 700

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50