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Ugo [173]
3 years ago
9

PLEASE HELP!!

Chemistry
1 answer:
Nookie1986 [14]3 years ago
5 0

Answer:

313.5cm²

Explanation:

Given parameters:

Weight of model  = 105pounds

Pressure applied on the scale by model = 2.16pounds per square inch

Unknown:

Area of her feet in cm² = ?

Solution:

Pressure is the force per unit area;

     Pressure  = \frac{Force}{Area}

Input the parameters and solve;

                2.16  = \frac{105}{Area}

       105  = 2.16 x Area

        Area = \frac{105}{2.16}   = 48.6in²

We need now to convert the in² to cm²

          1in² = 6.45cm²

        48.6in² = 48.6 x 6.45  = 313.5cm²

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