Sophie went on a road trip to Disney World she averaged 51 mph on the way there and 58 mph on the way back if total driving time took seven hours round-trip then how far does she live from Disney World round 2 decimal places.

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?

How do i simply this radical expression?