The dosage for a certain medication is 12 teaspoon for

Question

1. The dosage for a certain medication is 1/2 teaspoon for every 30 lb of body weight. What is the dosage for a person who weighs 105 lb?
2. A cashier has only five- dollar and twenty-dollar bills in her register. If the register contains 19 bills worth $215, how many five-dollar bills does she have?
3. Jessica paid $5.95 for some $0.20 and $0.35 stamps. The number of $0.35 stamps was one less than twice as many $0.20 stamps. How many of each type of stamp did she buy?
4. A truck passes the Oneida highway exit at 2 p.m going 55 mph. fifteen minutes later, a motorcycle, headed in the same direction, passes the same exit at 70 mph. At what time will the motorcycle pass the truck?