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1 answer:
Answer:
The ball throw into the air with an initial velocity of 22 meters per second is 27.4 meters above the ground after 3 seconds.
Step-by-step explanation:
The quadratic function represents the height of the ball above the ground, h(t), in meters, with respect to time, t, in seconds.
To find h(3), substitute t = 3 into the function expression:
Meaning: the ball throw into the air with an initial velocity of 22 meters per second is 27.4 meters above the ground after 3 seconds.
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c(x) = 114.6×(1 -0.066)^x
evaluates to about 1.9 (million tons) for x = 60 years after 1950.
The amount of coal used in the US in 2010 is estimated at 1.9 million tons.