a phone company uses the expression 1.25 + 0.10m to calculate the cost of a phone call that lasts m minutes. what is the cost of a call that

Question

a phone company uses the expression 1.25 + 0.10m to calculate the cost of a phone call that lasts m minutes. what is the cost of a call that lasts 20 minutes?

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Xavia 5 months 2021-08-27T23:13:24+00:00 1 Answers 0 views 0

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  1. thongdat2
    0
    2021-08-27T23:15:13+00:00
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    Answer:

    f(20) =3.25

    Step-by-step explanation:

    Given

    f(m) = 1.25 + 0.10m

    Required

    f(20)

    We have: f(m) = 1.25 + 0.10m

    Substutute 20 for m

    f(20) =1.25 + 0.10*20

    f(20) =1.25 + 2

    f(20) =3.25

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