Josephine was charged $7. 20 for a long distance call that lasted 1. 5 hours. What was the cost per hour for her long distance call?.

Which food would provide you with the most calcium?

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

Astudent randomly draws a card from a standard deck and checks to see if it's his favorite suite he then returns the cards to the deck