Fill in the blank with the correct power of 10.

I need a little help with this:

A. 0.15 megaton = 1.5 X ___________________ tons


B. 10.5 kilovolts= 1.05 X ____________________ volts

Million tons in a megaton (10^6)
0.15 million tons which would be 0.15x10^6. Move the decimal point down and get rid of one power:
Ans= 1.5x10^5

Thousand volts in a kilovolt (10^3)
We want 10.5 thousand volts which would be 10.5x10^3. Move the decimal place up and and add a power:
Ans - 1.05x10^4

A. 10^5
B. 10^4