Chapter 1.7, Problem 32E

Daily Volume of Business A supermarket finds that its average daily volume of business, V (in thousands of dollars) and the number of hours, t, that the store is open for business each day are approximately related by the formula.

$V=20\left(1-\frac{100}{100+t^2}\right),0\le t\le 24$.

Find ${\frac{dV}{dt}|}_{t=10}$.

${\frac{dV}{dt}|}_{t=10}$