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gabbyalicorn
 one year ago
A circular piece of metal has a radius of 3.5 meters.
The metal sells for $3.25 per square meter.
What is the total cost of the circular piece of metal?
A.
$11.38
B.
$38.47
C.
$71.44
D.
$125.01
gabbyalicorn
 one year ago
A circular piece of metal has a radius of 3.5 meters. The metal sells for $3.25 per square meter. What is the total cost of the circular piece of metal? A. $11.38 B. $38.47 C. $71.44 D. $125.01

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0first find the area of the metal

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do you remember the formula for the area of a circle?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The formula is \[\pi r ^{2}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0where r is the radius

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what's the radius of the circle?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yep, so plug it into the formula and tell me what the area is

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0correct. now multiply that by pi

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, so that is the area of the metal

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now we need to multiply that value by 3.25 to get the cost

gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0okie so do we multiply 3.25 by π

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no, multiply it by the area

gabbyalicorn
 one year ago
Best ResponseYou've already chosen the best response.0which is 3 3.5?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you just calculated the area
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