To get the Area you need the Radius to get the Radius you need to divide 14 by 2 14/2=7
The Radius is 7 now to get the area we need to multiply 7 by 7 but also add pi 3.14
7*7*3.14=153.86
5 significant figures but note that 0 is only non-significant when it begins a decimal its only significant when it's in between numbers or after a number
Let C and d be the circumference and diameter of a circle, respectively. Then
C = πd
so that
π = C/d = C/12