anonymous
  • anonymous
An aluminum plate is made according to the following dimensions. The outer radius is 10 inches and the inner radius is 3 inches. Use p = 3.14 as an approximate value. (a) How many square inches in area is the aluminum plate (the shaded region)? (b) If the cost to construct the plate is $7.50 per square inch, what is the construction cost?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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radar
  • radar
\[(\pi)10^{2}-(\pi)3^{2}\]
radar
  • radar
that is the area of the plate in sq in. now multiply cost of $7.50 per square in.
anonymous
  • anonymous
Multiply it by what?

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More answers

radar
  • radar
Calculate area as shown in my first response (100pi-9pi) then multiply your answer by $7.50
anonymous
  • anonymous
I still don't know what my answer is.. I think I'm doing something wrong?
radar
  • radar
Use your calculator and solve the area. Do this Pi(100-9)=91pi. Multiply Pi by 91 the results is the area. Multiplly the area by $7.50 that will be your cost.

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