Question

Sarah and Kelvin are calculating the area of a circle with a radius of 52 cm. Kelvin uses 3.14 for pi when calculating this area while Sarah uses the pi button on her calculator. Kelvin gets a solution of 8,490.56 cm2, and Sarah gets a solution of 8,494.87 cm2.

Answer 1

Kelvin would be off because he's using an estimate for Pi because it is endless, so he's rounding at the start and his answer will be incorrect.