lan tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds after she jumps for the bone can be represented by the function, h(t) = –16t² + 20t. What is Spot's average rate of ascent, in feet per second, from the time she jumps into the air to the time she catches the bone at t = ½ second?

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