Answer:
3 x 10⁻² g/mL
Explanation:
First you need to remember when you are dividing an exponent by another exponent, you subtract the bottom exponent from the top exponent.
So 10⁻³ - 10⁻1 you would take ( -3) - ( -1). When you subtract a negative number you change it into a positive number and add it to the first.
It is ( -3) + ( 1). So 10⁻³ - 10⁻¹ = 10⁻². You added 1 to the -3.
Now you just have to divide the whole numbers 6 ÷ 2 = 3
Also include your units.
Putting it all back together, you end up with 3 x 10⁻² g/mL
If you want to check you math, convert both numbers to regular numbers:
6 x 10⁻³ = 0.006 and 2 x 10⁻¹ = 0.2 and 0.006/0.2 = 0.03
in scientific notation 0.03 is 3 x 10⁻²
