A hair dryer is rated at 1200 W. If you use the dryer for 0.25 h, how much electric energy do you use?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?