the martinez family walked three over five of a mile in three over eight of an hour. what is their unit rate in miles per hour?

three-fifths over three-eights equals one and three-fifths miles per hour
three-eighths over three-fifths equals one and three-fifths miles per hour
three-eighths over three-fifths equals five over eight miles per hour
three-fifths over three-eights equals five over eight miles per hour

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

the answer is 1/4

step-by-step explanation:

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