One ticket to a show costs $ 50. Michelle buys a total of 5 tickets for the show using a coupon that gives her a 15% discount. Jennifer buys 8 tickets using a coupon that gives a 25% discount. How much more did Jennifer pay than Michelle?
There are two teams of two people each competing in a relay race. The race is for 1km, and each member of a team has to run 500 meters David and Deborah are in one team, and the Donna twins form the second team. David can run 500 meters in
minutes. Deborah can run 500 meters in
minutes. Each of the Donna twins can run 500 meters in
minutes. Which pair wins the race and by how much time?