what is it......

Question

The function d=16t2�=16�2 gives the distance, d, that a rock will fall in t seconds. This function is modeled in this graph.

Using this formula and the graph, how far will the rock fall in 3 seconds?

Responses

1. 50 feet
2. 50 feet
3. 96 feet
4. 96 feet
5. 144 feet
6. 144 feet
7. 256 feet
8. 256 feet

Answer 1

144 feet in 3 seconds

h(t) = -16t^2 is the general formula when initial velocity = 0

use a negative sign to indicate downward movement, or use a + sign if you want

h(3) = -16(3)^2 =-16(9)= -144 feet when time t = 3 seconds