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. A map has the scale 1 inch = 10 miles. On the map, the area of Big Bend National Park in Texas is about 12.5 square inches. Estimate the actual area of the park in acres. (Hint: 1 square mile = 640 acres)

Guest Mar 18, 2017
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 #1
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1in = 10 miles

(1 in)^2   = 1 in^2 =  (10 miles)^2   = 100mi^2

 

So

 

12.5  in^2  =   12.5 (100 mi ^2)   =  1250mi^2

 

So   1250mi^2  x 640 acres/mi^2   =  800,000 acres

 

 

cool cool cool

CPhill  Mar 18, 2017
 #2
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You take the square root of 12.5 =3.5355......Inches on the map(being one dimention).

3.5355... x 10 =35.355......Miles - one dimention of the park.

35.355.... x 35.355..... =1,250 sq.miles -the area of the park.

1,250 x 640 =800,000 acres - the area of the park.

Guest Mar 18, 2017

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