Question

The height of a rocket, in meters, is approximated by the polynomial -5t^2+45t+4 where t is time in seconds after the rocket's launch. what is the height of the rocket after 3 seconds?

a.124 meters
b.109 meters
c.86 meters
d.94 meters

Answer 1

Answer: (D) 94 METERS

We plug in $t=3$ into the polynomial to find the height of the rocket after 3 seconds:

-5(3)^2+45(3)+4 =-45+135+4 = 94

Therefore, the height of the rocket after 3 seconds is 94 meters.