The horse racing record for a 1.50 mi track is shared by two horses. fiddle isle, who ran the race in 143 s on march 21, 1970, and john henry, who ran the same distance in an equal time on march 16, 1980. what were the horses' average speeds in: a. mi/s

Answer question above and explain each step : )

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Need on this one asap im almost done with this subject