Answer:
20
Step-by-step explanation:
If the ball hit the ground it means that its height is equal to 0. In order to find the time after the ball <span>will hit the ground, we need to find the solution of the equation h(x)=0 which is different to 0.
-4.9x^2+21.3x=0
x(-4.9x+21.3)=0
-4.9x+21.3=0
x=21.3/4.9 = 4.3469 seconds</span>
Answer:
C. 63.4
Step-by-step explanation:
Answer: see attachments
<u>Step-by-step explanation:</u>
Slope-Intercept format is: y = mx + b
↓ ↓
↓ Intercept (where it crosses the y-axis)
Slope (rise over run)