exam Maths Puzzle Numerical Ability

Find the area of a circular region if the circumference is 16 pie centimeters. Express the answer in terms of pie.

Not sure how to do the symbol for pie.
Thanks

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exam Other Question

Solve by the substitution method.Type an ordered pair,the solution of the system is???

4x + 3y = -14
x = 5 - 5y
Help please. Hi, I need help reducing this rational expression to the lowest terms.

4v^2+11v+6 over 2v^2-v-10 / (4v^2-21v-18 over 2v^2-3v-5 * 4v^2-7v+3 over 4v^2-27v+18)

Thanks for any he