Carly wants to ride the bumper cards 5 times and the ferris wheel 2 times. it cost 5 tickets to ride the bumper cars and 5 tickets to ride the ferris wheel. how many tickets to ride the ferris wheel and bumper cards does carly needs?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

Math i have no idea how to do a and b

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?