Question

the height,h metres,of a ball is projected directly upwards from the ground can be modelled by h=56t -7t²,where t is the time in seconds after it leaves the ground.
(1)find the height of the ball 3'5 seconds after it leaves the ground.

Answer 1

Answer:

(1) 110.25 metres

Step-by-step explanation:

$56 \times 3.5 = 196 \\ 3.5 {}^{2} = 12.25 \\ 7 \times 12.25 = 86.75 \\ 196 - 86.75 = 110.25$

the answer is 110.25 metres