collegebound3506
23.10.2020 •
Mathematics
Question 8! Need help please
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Ответ:
Ответ:
5.22 seconds
Step-by-step explanation:
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