Emergency .what is 6 divide a by 15 1/2?

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

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Aline passes through 3,7 and 6,9 what equation represents the line