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7-60.

The velocity of a plane flying from San Francisco is given by $v(t) = 270\sqrt { t }$ where t is measured in hours and $v(t)$ in miles per hour. Calculate the average velocity of the plane between the first and fourth hours. Homework Help ✎

You are given a velocity function and you want to find average velocity.
Should you use 'average area under the curve' or 'slope of the secant'?