Scientific notation hw help please?

Question

please answer the following...

*write the following answers in scientific notation.

1) 0.4526meters divided by 8.4meters

2) (5.3 x 10^4)+(1.3x 10^4)

3) (7.2 x 10^negative4thpower) divided by (1.8 x 10^3)

thank you=]

Answer 1

1) 5.39 X 10^-2

2) 6.6 X 10^4

3) 4 X 10^-7