C =2 pie r
a) Find the value of C when t = 3.142 and r= 5

A = pie r squared
b) Find the value of A when pie= 3.142 and r = 5

Circumference, C is 31.42 units and Area, A is 78.55 sq. units

Step-by-step explanation:

Step 1: Find C when π = 3.142 and r = 5

C = 2πr = 2 × 3.142 × 5

   = 31.42 units

Step 2: Find A when π = 3.142 and r = 5

A = πr² = 3.142 × 5² = 3.142 × 25

   = 78.55 sq. units

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