So, I just started taking a basic chem class but the problem is I haven't taken one since Junior year of high school. Soooo, I need help with a few problems that I'm pretty sure I'm just confused about the directions or how to start them.

First section,

Use appropriate prefixes to write the following measurements without the use of exponents.

(a). 1.1 x 10^-10 L

answer needs to be _______nL

So do I just take the 1.1 Liters and convert to nanoliters? Or do I convert the 1.1x10^-10L to decimal form and then go from there to nanoliters? And if I do, how do I do it?

Very simple, but I just don't understand.

Second section,

Carry out the following operations, and express the answer with the appropriate number of significant figures.

(a). 320.69 - (3104.9/3.3)

I got 620.2 but apparently that is incorrect.

I know that with adding and subtracting you have the sig figs of the number with the smallest sig figs. With multiplying and dividing, I know you take the amount of sig figs with the least as well. So in this case, would I have 2 sig figs? Or sig figs and 1 decimal place?

Thank you!