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Use this equation....

x= x0 + V0*t + a*t^2

x0 = 0

v0 = 75 m/s

a = (145-75)/15 = 4.67 m/s^2

t = 15 s

x = 0 + 75 m/s * 15s + 4.67 m/s^2 *15^2

x = 2176 m

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Q: How far does a plane fly in 15 seconds while its velocity is increasing from 75 meters per second to 145 meters per second at a uniform rate of acceleration?
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