Please help! This is the last question for my math test and I really need a good grade!

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?

How many square centimeters of wrapping paper will be used to wrap the shoe box?