Please help!!! The area of a rectangular region is 6.2 × 10^3 square feet. The length of the rectangular region is 1.55 ×

Question

Please help!!!
The area of a rectangular region is 6.2 × 10^3 square feet. The length

of the rectangular region is 1.55 × 10^2 feet. How much does it cost to

surround the region with a border that costs $0.80 per foot?

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Thu Hương 4 years 2021-08-22T18:01:00+00:00 1 Answers 6 views 0

Answers ( )

  1. RuslanHeatt
    0
    2021-08-22T18:02:50+00:00
    Reply

    Answer:

    312

    Step-by-step explanation:

    First we need to determine the width

    A = l*w

    6.2 * 10 ^3 = 1.55 * 10 ^2 * w

    Divide each side by 1.55 * 10 ^2

    6.2 ^ 10 ^3  /1.55 * 10 ^2 = 1.55 * 10 ^2 * w / 1.55 * 10 ^2

    Changing from scientific notation to standard

    6200/155 = w

    40 = w

    Then we need to determine the perimeter

    P = 2(l+w)

    P = 2( 155+40)

    P =2( 195)

    P = 390

    Now multiply by the price

    390 *.80

    312

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