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Oksana_A [137]
3 years ago
14

Stephanie is a very good soccer player. She can kick a soccer ball with an initial velocity of 21.3 m/sec. The function that rep

resents the height of the ball with respect to time is ℎ (x) = − 4.9 x^2 + 21.3 x . About how many seconds will it take for the ball to hit the ground?
Mathematics
1 answer:
algol [13]3 years ago
4 0
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>
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