Mara’s family is driving to her grandmothers’ house. The family travels 239.4 miles between the hours of 9:10 a.M. To 1:40 p.M. Write an equ

Question

Mara’s family is driving to her grandmothers’ house. The family travels 239.4 miles between the hours of 9:10 a.M. To 1:40 p.M. Write an equation that Mara can use to determine their average rate of travel, R, rounded to the nearest mile per hour.

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Answers ( No )

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    2021-10-14T23:01:51+00:00

    Answer:53.2 mph

    Step-by-step explanation:

    0
    2021-10-14T23:02:05+00:00

    Answer:

    53.2 mph

    Step-by-step explanation:

    Mara’s family travels 239.4 miles between the hours of 9:10 a.m. to 1:40 p.m.

    1:40 p.m. is 13:40.

    Thus, they traveled for

    13 hours 40 minutes – 9 hours 10 minutes = 4 hours 30 minutes

    that is 4\frac{1}{2}=4.5 hours.

    Use formula:

    D=r\cdot t,

    where

    D = distance

    r = rate

    t = time.

    In your case,

    D = 239.4 miles

    t = 4.5 hours

    Hence,

    239.4=4.5r\\ \\r=\dfrac{239.4}{4.5}=53.2\ mph

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