What is the area of a circle with a diameter of 15 mm? Use 3.14 for pie. Round to the nearest tenth.

Question

Mathematics

Justin Hunter

20 December, 13:04

What is the area of a circle with a diameter of 15 mm? Use 3.14 for pie. Round to the nearest tenth.

+5

Answers (2)

Know the Answer?

Olivia Riddle · Answer 1

47.1

Step-by-step explanation:

A=PIEr^2

if you have the diameter you dont need to square it so it is simply PIE (15)

then you get 47.1238898

round it

47.1

Brenden Barber · Answer 2

176.6 mm^2

Step-by-step explanation:

We need to find the radius

r = d/2

r = 15/2 = 7.5

We want the area of a circle

A = pi r^2

A = pi * (7.5) ^2

= 3.14 * 56.25

=176.625

Rounding to the nearest tenth

176.6 mm^2