Question 119208
{{{h=-16t^2 +1100}}} Start with the given equation



{{{h=-16(4.1)^2 +1100}}} Plug in {{{t=4.1}}}



{{{h=-16*16.81+1100}}} Square 4.1 to get 16.81




{{{-268.96+1100}}} Multiply {{{-16}}} and {{{16.81}}} to get {{{268.96}}}  (ie {{{-16*16.81=268.96}}})



{{{831.04}}} Add {{{-268.96}}} and {{{1100}}} to get {{{831.04}}}  (ie {{{-268.96+1100=831.04}}})



So at 4.1 seconds, the height of the object is 831.04 ft



So the answer is B)