Margaret compared the size of two round kitchen plates. One plate has a diameter of 9 inches and the other plate has a diameter of 14 inches. What is the approximate difference between the areas of the two plates?
A 80 square inches
B. 90 square inches
C. 100 square inches
D. 110 square inches
2 answers:
B 9/2 squared is 20.25 20.25 x 3.14 = 63.585 14/2 squared is 49 49 x 3.14 = 153.86 153.86-63.585=90.275
Answer:
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Step-by-step explanation:
First find the areas of both:
The plate with a diameter of 9 inches has an area of 63.585
The plate with a diameter of 14 inches has an area of 153.86
The difference of these areas is approximately 90
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