Allen started to save money from his daily allowance. In the first week he saved $5.8 and every next week $3.6 more than the previous week.

Question

Allen started to save money from his daily allowance. In the first week he saved $5.8 and every next week $3.6 more than the previous week. How much money did he save in 4 weeks?

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Remi 4 days 2021-10-13T05:31:52+00:00 2 Answers 0

Answers ( )

    0
    2021-10-13T05:32:57+00:00

    Answer: $16.60

    Step-by-step explanation:

    5.80+ 3.60= 9.40+ 3.60= 13.00+ 3.60= 16.60

    So after 4 weeks he earned $16.60

    0
    2021-10-13T05:33:06+00:00

    Answer:

    $44.8.

    Step-by-step explanation:

    Let a = first term = $5.8

    d = common difference = $3.6

    n = number of terms = 4

    Using the sum of terms

    Sn = n/2((2a + (n – 1)d))

    Sn = 4/2((2(5.8) + (4 – 1)3.6))

         = 2(11.6 + 10.8)

         = 2(22.4)

         = 44.8

    In 4 weeks, Allen would have saved $44.8.

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