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3) 4) Krista’s mom has told her she need to make the pen 1 2 the size that she had planned (5 feet long by 4 1 2 feet wide). What will the area be? What are two possible lengths and widths she could use? Tom had a very challenging fraction multiplication problem to do, but his sister said it was really easy to do mentally. Can you fi nd the answer mentally? Explain how. x 76 81 80 76

Sagot :

ohorowitz

Answer:

1. area of new pen = 11 1/4 ft^2

2. i. 5 feet by 2 1/4 feet

ii. 2 ½ feet by 4 ½ feet

Step-by-step explanation:

The size of the pen as planned = 5 ft long by 4 ½ ft wide

Area of the pen = length x width

                          = 5 x 4 ½

                          = 5 x 9/2

Area of the pen = 45/2

                          = 22 ½ ft^2

But, Krista has to make the pen ½ the size of planned. So that; area of new pen = ½ x 22 ½

       = ½ x 45/2

       = 45/4

       = 11 1/4

area of new pen = 11 1/4 ft^2

The area of the new pen would be 11 1/4 ft^2.

The possible values she could use are:

i. 5 feet by 2 1/4 feet

ii. 2 ½ feet by 4 ½ feet

adengorib

Answer:

I have those same questions

Step-by-step explanation:

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