## Algebra 2 (1st Edition)

$\approx80.39$ mph
Plugging in $B=12$ into the formula we get: $12=1.69\sqrt{s+4.25}-3.55\\15.55=1.69\sqrt{s+4.25}\\9.2\approx \sqrt{s+4.25}\\84.64\approx s+4.25\\s\approx80.39$