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.

a. both answers are equally accurate.
b. kelvin; he did not have to round his answer.
c. neither answer is accurate as pi or 3.14 is not in the formula for the area of a circle.
d. sarah; the pi button on the calculator gives a more accurate representation for pi than 3.14.