Question

I got the answer 0.007853982 inches sq, but it says it’s not correct, what am I doing wrong?

Answer 1

Area of pupil = 0.007855 square inch.

Explanation:

Given the following data;

Diameter = 0.1 inch

To find the area of the pupil (circle);

Area of circle = π(D/2)²

Area of pupil = 3.142*(0.1/2)²

Area of pupil = 3.142*(0.05)²

Area of pupil = 3.142*0.0025

Area of pupil = 0.007855 square inch.