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Ivan
3 years ago
15

Help me with this problem please a and b

Mathematics
1 answer:
nadya68 [22]3 years ago
5 0
(a) Compare your quadratic for h to the general quadratic ax² +bx +c. Perhaps you can see that ...
  a = -16
  b = 128
You use these numbers in the given formula to find the time when the ball is highest.
  t = -b/(2a) = -128/(2(-16)) = 4 . . . . . . the time at which the ball is highest


(b) Evaluate the quadratic to find the height at t=4.
  h = -16(4)² +128(4) +21
  h = -256 +512 +21
  h = 277
The maximum height of the ball is 277 ft.

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