Tom always keeps his 4 gardens clean. he take 20 minutes to clean a single garden. how much time will it take to clean a four gardens?

Someone . me. compound probability

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Charlie tosses five coins.what is the probability that all five coins will land tails up.