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Vinvika [58]
4 years ago
6

HELPP ASSAP WILL MARK BRAINIEST

Mathematics
1 answer:
chubhunter [2.5K]4 years ago
7 0

Answer:

Step-by-step explanation:

H=7+30t-16t²

20=-16t²+30t+7

0=-16t²+30t-13

T=(-30±√(900-4(16)13))/-32

T=0.68 s or T=1.2 s

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