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April 21, 2014

April 21, 2014

Posted by **Thomas** on Sunday, January 5, 2014 at 10:42pm.

a. 2 1/2 pi cm^2

b. 4 1/4 pi cm^2

c. 5 1/4 pi cm^2

d. 6 1/4 pi cm^2

e. 7 1/2 pi cm^2

please answer and explain

- math -
**Reiny**, Sunday, January 5, 2014 at 10:53pmSince the radius of the new circle is 1/2 of the original, and the radius is squared in the area formula, the new area must be 1/4 of the original

so what is (1/4) of 25 ?

- math -
**Thomas**, Sunday, January 5, 2014 at 10:56pmd. 6 1/4 pi cm^2

- math -
**Reiny**, Sunday, January 5, 2014 at 11:03pmcorrect

- math -
**ricardo**, Wednesday, March 5, 2014 at 3:39pmThe diameter of a circle is 10 meters. What is the area of the circle? (Use 3.14 for mc004-1.jpg and round to the nearest tenth.)

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