$A ( x ) = - 0.015 x ^ { 3 } + 1.05 x$

question 340

True/False

$A ( x ) = - 0.015 x ^ { 3 } + 1.05 x$ gives the alcohol level in an average person's blood $x$ hrs after drinking 8 oz of 100 - proof whiskey. If the level exceeds $1.5$ units, a person is legally drunk. Would a person be drunk after 3 hours?