Write in Scientific Notation

Question

1. (3X10to the tenth) (7X10to the -4th)

2. (5X10to the 4th)to the second

Thanks so much!

Answer 1

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

Answer 2

it needs to be written in scientific notation.

Answer 3

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...

Answer 4

Thanks