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26 March, 02:55

When Jonas does his math homework, he spends an average of 2 minutes on each problem. Last night he spent 1.6 hours on his non-math homework, plus he completed 5 math problems. Approximately how much time did Jonas spend in total on all of his homework last night?

A.

1.3 hours

B.

2.7 hours

C.

1.8 hours

D.

2.2 hours

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Answers (1)
  1. 26 March, 05:55
    0
    C.

    1.8 hours

    Step-by-step explanation:

    total homework time = math homework time + non math homework time

    math homework time = 5 problems * 2 minutes/problem

    = 10 minutes

    = 10 minutes * 1hr/60 minutes =.167 hrs

    non math homework time = 1.6 hours

    total homework time = math homework time + non math homework time

    total homework time =.167 + 1.6

    total homework time = 1.77 hrs

    rounding

    total homework time = 1.8 hrs
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