The area of a circular metal plate is 225pi square inches. if the radius of the plate is tripled, what will be its new area?
a. 2025pi in^2
b. 2450pi in^2
c. 3575 in^2
d. 4225 in^2

A. 2025pi in^2

Step-by-step explanation:

If you change a linear dimension by a factor of k, the area changes by a factor of k^2.

The radius changes by a factor of 3. The area changes by a factor of 3^2 which is 9.

9 * 225pi square inches = 2025pi square inches

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step-by-step explanation: