scientific notation

Algebra
Tutor: None Selected Time limit: 1 Day

there are 2x10^7 people who live in NY state and 5x10^5 of those people live in Staten Island .How many times bigger is the population of NY state than the population of Staten Island

Apr 9th, 2015

Divide the number of people who live in NY Sate by the number of people who live in Staten Island:

2x10^7 / 5x10^5 = 0.4x10^2   BUT in scientific notation we always have a one digit number followed by a decimal point.

So, we change 0.4x10^2  to  4.0x10^1 which equals 4x10 = 40

So, the population NY State is 40 times bigger than the population of Staten Island.

Apr 9th, 2015

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Apr 9th, 2015
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