Question

I need someone to check my answers! ;)
Write in scientific notation:
(7.2 x 10^9)(9.4 x 10^8)

Answer 1

I got 67.68 x 10^17

Answer 2

Scientific form is always with the decimal on the first place.

so,

6.768 x10^18

Answer 3

Alright. my math teacher told us (7.2 x 9.4) x (10^9+8)

Answer 4

She was right.

Answer 5

But she must have missed the last part.

Answer 6

okay--so, the answer is 6.768 x 10^18?

Answer 7

okayy, well how about this one?
Scientific notation: (4.0 x 10^3)^4
My answer: 256 x 10^12

Answer 8

Now move the point to first term

Answer 9

2.56 x 10^14