The formula for rate is r = d/t.
The dolphin's rate in feet per hour is 221,760 feet / hour.
The formula for time is t = d/r.
Rate is total distance travelled per time. Rate is determined by dividing the distance travelled by time.
Rate = distance / time
In order to solve for r, we need to make r the subject of the formula. Given this equation : d = rt, divide both sides of the equation by t
r = d/t
r = 665,280 / 3 = 221,760 feet / hour
In order to solve for t, we need to make t the subject of the formula. Given this equation : d = rt, divide both sides of the equation by r
t = d/r
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