YeooYeett YeooYeett

02-01-2019
Mathematics

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Help please, just number 3, thats all im asking, thanks.

Help please just number 3 thats all im asking thanks class=

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mathstudent55 mathstudent55

02-01-2019

The rectangle that has area 400 has width 10, so its length is 40.

A = LW; L = A/W = 400/10 = 40

The length is 10 + 0.2 = 10.2. The width is 10 + 2 = 12

The multiplication is 10.2 * 12

40.2 * 12 = 40 * 10 + 0.2 * 10 + 40 * 2 + 0.2 * 2

40.2 * 12 = 400 + 2 + 80 + 0.4

40.2 * 12 = 482.4

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