Help me with Algebra!!!

Question

Use any division method you prefer and determine the following>>> A rock is tossed up at 20 m/s. The height of the rock after T seconds is h(T)=-9.8T^2+20T+1. What is the height of the rock after 2 seconds? Show all math steps to the solution.

Answer 1

h(2) = -9.8(2)²+20(2)+1

= -39.2+40+1

= 1.8 meters

Are you sure the given function is correct? Usually h(t) = gt²/2 +v₀t + s₀, where g = -9.8 m/s², so the formula given has double the gravity of earth.

Why does the question mention a division method?

Answer 2

h(2) = -9.8(2)² + 20(2) + 1