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Alla [95]
3 years ago
14

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
<h3>To find</h3>
  • 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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