## Calculus 8th Edition

(a) $N = 3.1046A^{0.308}$ (b) $18$
(a) Using technology, a power regression equation is found to have $a \approx 3.1046$ and $b \approx 0.308$, where the equation is in the form: $N = aA^{b} = 3.1046A^{0.308}$ (b) Inputting 291 miles into the equation in (a): $N = 3.1046 \times (291)^{0.308} \approx 18$