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:

Question

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 = 3,500 + 200 ln a    (a ≥ 1)
How many units are sold after spending $1,000? (Round your answer to the nearest whole number.)

Steve · Answer

well, what is 3500 + 200 ln(1000) ??