40 - [(5 x 2) + (5 x 4)]​

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

Find the measure of angle a in the following triangle

Describe a situation where it would be beneficial to round decimals to the nearest dollar. explain why you would use rounding in that situation.