Last one im asking for help lol

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Mihayl asked Jul 5, 2023

4,713 views

18 votes

Last one im asking for help lol

Mathematics
high-school

Mihayl asked Jul 5, 2023

by Mihayl

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1 Answer

15 votes

Answer:

2.0

Explanation:

$when \: the \: object \: hit \: the \: ground \: \\ h(t) = 0 \\ - 4.9 {t}^(2) + 5t + 9 = 0 \\ a = - 4.9 \: \: b = 5 \: \: c = 9 \\ x = \frac{ - \: b \: - \sqrt{ {b}^(2) - 4ac} }{2a} \\ x = \frac{ - \: 5 \: - \: \sqrt{ {5}^(2) - 4( - 4.9) * 9} }{2( - 4.9)} \\ x = ( - \: 5 \: - √(25 + 176.4) )/( - 9.8) \\ x= 2.0$