Airfares for flights from Sacramento to San Diego cost $180 for first class and $120 for coach. A flight has 52 passengers who paid a total of $7260. How many first class passengers were on the flight?

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Change negative exponents to positive, then solve

What is the surface area of the sphere?