Find the diameter of each circle. Use your calculator's value of pi Round your answer to the nearest tenth. 21) area=201.1in^2 22) area=78.5ft^2 Find the circumference of each circle. 23) area=64pi mi^2 24) area=16pi in^2 Find the area of each. 25) circumference=6pi yd 26) circumference=22pi in

## Step 1:<br />We are given the area of the circles and we need to find the diameter. The formula for the area of a circle is \(A = \pi r^2\), where \(A\) is the area and \(r\) is the radius. We can rearrange this formula to solve for the radius: \(r = \sqrt{A/\pi}\). The diameter is twice the radius, so \(D = 2r\).<br /><br />## Step 2:<br />We are given the area of the circles and we need to find the circumference. The formula for the circumference of a circle is \(C = 2\pi r\), where \(C\) is the circumference and \(r\) is the radius. We can rearrange this formula to solve for the radius: \(r = C/(2\pi)\).<br /><br />## Step 3:<br />We are given the circumference of the circles and we need to find the area. The formula for the circumference of a circle is \(C = 2\pi r\), where \(C\) is the circumference and \(r\) is the radius. We can rearrange this formula to solve for the radius: \(r = C/(2\pi)\). The area of a circle is \(A = \pi r^2\).