Find the slope of the line passing through each of the following pairs of points and draw the graph of the line. (−4, −1), (2, 3
1 answer:
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Let 
represent the number of feet that the balloon rises in the 
minute.
so
ft , means that in the 1st minute, the balloon rose 40 feet
ft, means : in the 2nd minute the balloon rose 60 feet
we notice that each minute, the balloon rises a multiple of 20, feet:
so it is clear that
during the 15th minute the balloon rises
(feet)
Answer: 320
so
we notice that each minute, the balloon rises a multiple of 20, feet:
so it is clear that
during the 15th minute the balloon rises
Answer: 320
Answer:
The speed is 20.8 m/s
Step-by-step explanation:
If a projectile ascends vertically, and after 3 seconds it reaches its maximum height, calculate the velocity that it carries to the middle of its downward trajectory
Let the maximum height is h and initial velocity is u.
From first equation of motion
v = u + at
0 = u - g x 3
u = 3 g.....(1)
Use third equation of motion
Let the speed at half the height is v'.