Answer:
.4 x .9
Step-by-step explanation:
You find this value by factoring. Factoring finds the zeros of the function. When the ball hits the ground, it has 0 height. Therefore, when the function goes through the x axis, it has a y value of 0. That means that when y = 0, the ball has hit the ground. Use the quadratic formula to factor

. Notice I rearranged the terms. When you factor that you get zeros of -3.19 and 2.19. The two things in math that will never EVER be negative are time and distance/length. Therefore, that tells us that the ball hits the ground 2.19 seconds after it was thrown.
13=idk
14=first minutes into hour: 40/60=2/3
speed=distance/time
=280/(2/3)
ans=420miles/hour
Answer:
1750 m/s
Step-by-step explanation:
1km = 1000m
1 hour = 60 minutes = 3600 seconds
( 630 * 1000 )/ (60 * 60)
= 1750 m/s
Step-by-step explanation:
- 16×1=16
- 16×2=32
- 16×3=48
- 16×4=64
- 16×5=80
- 16×6=96
- 16×7=112
- 16×8=128
- 16×9=144
- 16×10=160