A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = - 16t2 + 576t. After how many seconds does the projectile take to reach its maximum height? Show your work for full credit.

i don't even understand what she is wanting me to do??????????

Question

A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = - 16t2 + 576t. After how many seconds does the projectile take to reach its maximum height? Show your work for full credit.

i don't even understand what she is wanting me to do??????????

anonymous · Answer

don't worry! it is the same thing! you just have to find the vertex! again...bring to use your favorite formula of the day! |dw:1343758767933:dw| but this time, be careful! your b= 576 and a = -16! so,|dw:1343758837445:dw|! so, it will reach its maximum height after 18 seconds!