Algebra
posted by Larry .
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 + 400 ln a (a ≥ 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 N and evaluate.
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