Given that Tn = -4n^2+56n-180 , determine the biggest numerical value of Tn​

What is the solution to the inequality

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 $s$?

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost