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Lyrx [107]
4 years ago
12

A model rocket is launched with an initial upward velocity of 47 ms. The rocket's height (in meters) after seconds is given by t

he following. Find all values of for which the rocket's height is 27 meters.h=47t-5y^2
Mathematics
1 answer:
Darina [25.2K]4 years ago
8 0

Answer:

0.61 or 8.79

Step-by-step explanation:

h = 47t − 5t²

27 = 47t − 5t²

5t² − 47t + 27 = 0

Quadratic formula:

t = [ -b ± √(b² − 4ac) ] / 2a

t = [ -(-47) ± √((-47)² − 4(5)(27)) ] / 2(5)

t = (47 ± √1669) / 10

t ≈ 0.61 or 8.79

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