Algerba 1
posted by katy .
Write in Scientific Notation
1. (3X10to the tenth) (7X10to the 4th)
2. (5X10to the 4th)to the second
Thanks so much!

1.
3 * 10^4 * 7 * 10^4
7*3 = 21
10^4 * 10^4 = 10^0 = 1
21 * 1 = 21
2.1 * 10^1
2. (5*10^4)^2=
25 * 10^8 = 2.5 * 10^9 
it needs to be written in scientific notation.

woops for the first I looked at it wrong...
3 * 10^10 xs 7 x 10^4
= 21 x 10^6
= 2.1 x 10^7
And ma'm, I believe it is written in scientific notation... 
Thanks
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