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C = 96.71 inches

A = 745.06 in ^2

Step-by-step explanation:

d = 30.8

The radius will be 1/2 d=   1/2 (30.8) = 15.4

The circumference = pi *d

                                 = pi * 30.8

                                  =96.761

The area = pi * r^2

                = pi * (15.4)^2

                = 745.06011

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation:

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