Question

If the Pacific Ocean is widening at a rate of 5 cm per year, how far (in kilometers) will it spread in two million years?

5cm = __m = ______km

1 million = _ _ 2 million =______

Answer 1

See explanation.

Explanation:

`5cm=5xx10^-2m=5xx10^-5km`

So :

• in 1 million years it will be:

`10^6xx5xx10^-5=5xx10^1=50`

In 1 million years Pacific will expand `50km`

• in 2 million years:

`2xx10^6xx5xx10^-5=10xx10^1=100`

In 2 million years Pacific will expand `100km`