Step-by-step explanation:
Total cost
= Cost of tools + Cost of materials
= $130 + 100 * $10
= $1,130.
Circumference = π × diameter
π × 9 = 28.274333882
To 1dp = 28.3
Circumference = 28.3 inches
28.27431 = x + 2
-2 -2
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x = 26.27431 Answered
the pie is 3.14159 x 9 =28.27431