Find the volume of this cone round to the nearest tenth 7 in 4 in = in^3

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Find the amount of simple interest earned for depositing the given principle in an account if $2200 is invested at 5.5 % for 6 months