14. Use mental math to simplify (4.55 +27) + 5.45.32131837
1 answer:
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Answer:
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Step-by-step explanation:
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Answer: 5.22 seconds
<u>Step-by-step explanation:</u>
t represents time and y represents the height.
Since we want to know when the ball hits the ground, find t when y = 0
Ball 1 starts at a height of 109 --> h = 109
0 = -16t² + 109
16t² = 109
t = 5.22