college algebra
posted by Tichie on .
An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula:
N = 2,500 + 400 ln a (a ¡Ý 1)
How many units are sold after spending $1,000? (Round your answer to the nearest whole number.)

you have the formula. Plug in 1000 for a and evaluate.

Graph f(x)= 1/2 ^(x+3) 2

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula:
N = 6,500 + 200 ln a (a ¡Ý 1)
How many units are sold after spending $1,000? (Round your answer to the nearest whole number.) 
N = 2,500+200 In a
N = 25,00+200*In 1000
N = 2,500+1381.6
N= 3881.6