Answer:
The instantaneous velocity after eight seconds is 9 m/s
Step-by-step explanation:
Given as :
The ball shot upward with velocity of 15 m/s
The height of the ball after t sec is given as h(t) =
Now, The instantaneous velocity after 8 sec = 
Or, The instantaneous velocity =
or, The instantaneous velocity = 
Now at t = 8 sec
The instantaneous velocity = 5 + 4 = 9 m/s
Hence The instantaneous velocity of ball at t = 8 sec , is 9 m/s Answer
Answer:
9.23
14.43-5.2=9.23
Step-by-step explanation:
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Answer:
217 children and 481-217 = 264 adults
Step-by-step explanation:
Step-by-step explanation:

Answer:
x+y=-2
7x-4y=8
Step-by-step explanation: