a rocket is launched from the top of a 70 ft cliff with an initial velocity of 120 feet per second. The height h, of the rocket after t seconds is given by the equation h=16t^2+120t+70. how long after the rocket is launched will it be 30 feet from the ground?

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

step-by-step explanation:

im not sure what the answer is

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

no its the same as every other grade

step-by-step explanation: