Question

The total amount of fresh water on earth is estimated to be 3.73 x 108 km3. What is this volume in cubic meters? In liters?

Answer 1

can you explain what you are having difficulty with?

1 km is 1000m

so you can work out how many cu m in 1 cu km

it will be easier if you work in exponent form.

Then you need to know that 1cu m = 1000 litres

so that make s the second part easy

Answer 2

^What he/she said. Use the train track method as well.