40.32 is 76.8% of what number??? HELP PLEASE I HAVE TO TURN IN A HOMEWORK IN 5 MINUTES

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line