Answer
$19$ degrees Fahrenheit
Work Step by Step
Given:
Wind chill = $35.74+0.6215\cdot T -35.75\cdot V^{0.16} +0.4275\cdot T\cdot V^{.16}$
$T=30$ degrees Fahrenheit
$V=15$ mph wind
Substitute the given values if $V$ and $T$ into the formula above to obtain
$\text{Wind chill temperature} = 35.74+0.6215\cdot 30 -35.75\cdot 15^{0.16} +0.4275\cdot30\cdot15^{0.16}$
$\text{Wind chill temperature} = 35.74 + 18.645 – 35.75\cdot1.542320395 + 12.825\cdot1.542320395$
$\text{Wind chill temperature} = 19.02730495$
$\text{Wind chill temperature} \approx 19$
