Cant seem to get these physics problem...?

1. The age of the universe is thought to be about 14 billion years. Assuming two significant figures, write this in powers of ten in seconds. Write answer in exponential notation 2. Multiply 2.079 x 10^2 m by 0.082 x 10^-1 taking into account significant figures. 3. A light year is the distance light... show more 1. The age of the universe is thought to be about 14 billion years. Assuming two significant figures, write this in powers of ten in seconds.
Write answer in exponential notation


2. Multiply 2.079 x 10^2 m by 0.082 x 10^-1 taking into account significant figures.

3. A light year is the distance light travels in one year (speed of light = 2.998 x 108 m/s). How many miles are in a light year? Give answer in exponential scientific notation.
1 answer