The importance of an economic model is that it allows us to: build an accurate mathematical model of every aspect of the economy. focus on the effects of only one change at a time. build a complex and accurate model of how the economy should work. avoid opportunity costs.

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds

d.) continue to rise rapidly

the answer is a wheel

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