(1 point) A coin, thrown upward at time t = 0 from an office in the Empire State Building, has height in feet above the ground t seconds later given by

h(t) = -16t2 + 48t+448 = -16(t – 7)(t + 4).

(a) From what height is the coin thrown? Include units in your answer. 512 feet

help (units)

(b) At what time does the coin hit the ground? Include units in your answer.

help (units)

The coin was thrown from 448 feet

Time to hit the ground is 7 seconds

Step-by-step explanation:

Given

Solving (a): Height when coin is thrown

At this point t = 0

So, we have:

Solve expressions in the brackets

Hence, the coin was thrown from 448 feet

Solving (b): Time to hit the ground

At this point, h = 0.

So, we have:

Reorder

Divide both sides by -16

This gives:

     or      

  or    

Since, time can't be negative;

jwjwkwkwkkkdjebd b jdjejdndj he jenej

1. 8

2. 9

3. 20

4. 3

5. 17

6. 2.2

7. 11.25

8. 1

9. 14

10. 2

step-by-step explanation:

thats the first half