Claire has a hot tub with a diameter of 7 feet. she wants to purchase a cover to protect the hot tub. what is the area of the cover? use = 3.14 and round the answer to the nearest square foot.

The answer is 38 ft

The cover would be a circle, and to find the area, the formula would be (pi)r^2. r stands for the radius, and a diameter(which is 7 for this problem) divided by 2 equals the radius.
the radius would be 3.5ft, because 7/2 is 3.5.
you would use the radius inside the formula:

a=(pi)r^2
a=(3.14)(3.5)^2
a=38.465

38.465 rounded would be 38.5ftsquared

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