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Tom drove 206 miles in 3.9 hours. estimate his average speed.

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)

Light travels at 186,000 miles per second. light takes about 1 1? 3 seconds to travel from the earth to the moon. calculate the distance between the earth and the moon based on the speed of light.