Posted by **Lina** on Tuesday, February 19, 2013 at 2:29pm.

A total revenue function is given by R(x) = 1000(x^2 - 0.1x)^1/2 , where R(x) is the total revenue, in thousands of dollars, from the sale of x items. Find the rate at which total revenue is changing when 20 items have been sold.

- Business calc -
**Steve**, Tuesday, February 19, 2013 at 2:36pm
that would be dR/dx when x=20

R = 1000(x^2-.1x)^2

R' = 2000(x^2-.1x)(2x-.1)

R'(20) = 31,760,400

- Business calc -
**Anonymous**, Friday, February 22, 2013 at 2:11am
Calculate the amount of interest on a loan of $3,200 at 6% interest for 60 days using

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