The equatorial circumference of earth is

4.01•10^4 kilometers. One kilometer is equivalent to 3.94•10^4 inches. What is the equatorial circumference of earth in inches?

Soooo confused

### 3 Answers

What’s this got to do with Radicals ? No wonder you’re confused – a Radical is the square root sign, or cube root sign etc. Multiply 4.01 x 10^4 by 3.94 x 10^4 i.e. (4.01 x 3.94) x 10^(4 + 4) = 15.7994X10^8 inches.

Just multiply the two numbers. (4.01*10^4 km * 3.94*10^4 in)/1km.

The km cancel and you get inches