Thread: Evaluate using scientific notation.

I havent taken math for years so please help me out. The problem is:

Using scientific notation, evaluate:


(4 x 10^8)^3 divided by (5 x10^-6)^2

Do I just convert this to 40 x 10^11 divided by 50 x 10^-4?

If so..

then I divide 40 by 50, which is .8

So we got .8 x 10^7 as the answer.

Am I doing this right? thanks.

Originally Posted by hansbethe

I havent taken math for years so please help me out. The problem is:

Using scientific notation, evaluate:


(4 x 10^8)^3 divided by (5 x10^-6)^2

Do I just convert this to 40 x 10^11 divided by 50 x 10^-4?

If so..

then I divide 40 by 50, which is .8

So we got .8 x 10^7 as the answer.

Am I doing this right? thanks.

.

Start with a refresher on exponent rules:
Exponents: Basic Rules

damn. lol. I was way off. thanks. what threw me off was the exponents outside the parentheses. I didnt know what to do with them. im gonna practice a couple more tomorrow. thanks a lot.

Originally Posted by Wilmer

Start with a refresher on exponent rules:
Exponents: Basic Rules

thanks i have a lot of those sites bookmarked. actually I already have that one bookmarked. I can do the simpler ones like 4.2 x 10^6 / 2 x 10^2 = 2.1 x 10^4

I just didnt do one or learn to do one with parentheses.