Question

What is the area of a circle of a radius 4.1×10^4 cm

Answer 1

Answer:

128805.2988 cm squared or 128000 to 3 significant figures.

Explanation:

Area of a circle : pi times radius squared or $r^{2} \pi$

pi times 4.1×10^4 cm = 41000 pi or 128805.2988