when 2.49 is multiplied by 0.17, the result rounded to 2 decimal places is? a 0.04 b 0.42 c 4.23 d .423 e .40

I'll be glad to check your answer.

okay so 2.49x0.17=0.4233. so would the answer be d (.423)

No. You haven't rounded to two decimal places.

4.23

I don't even understand this im no good at math what so ever. so rounding is something that is hard to me. same with the rest of the questions.

so what do I do to round or how do I round?

Yes. 4.23 is rounded to two decimal places. You have two numbers after (to the right of) the decimal point.

http://www.mathsisfun.com/rounding-numbers.html

thank you okay I get it the decimal comes one places after the zero

No.

the answer is b. .42