3 years ago

PLEASE HELP

Mathematics

1 answer:

ZanzabumX [31]3 years ago

3 0

Answer:

t = 2.7 seconds
t = 4.9 seconds

Step-by-step explanation:

<h3>Given </h3>

Function

s(t) = - 16t2 + 122t

Value of t when s(t) = 213

<h3>Solution</h3>

213 = -16t^2 + 122t
16t^2 - 122t + 213 = 0
t = (122 ± √(-122)² -4*16*213)/2*16
t = (61 ± √313)/16
t = 2.7 seconds, t = 4.9 seconds

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