The number of flights leaving a certain airport doubles during every one-hour period between its 9 am opening and noon; afternoon, the number of flights leaving from the airport doubles during every two-hour period. If 4 flights left from the airport between 9 am and 10 am, how many flights left the airport between 2 pm and 4 pm?

Rahim's convertible gets gas mileage that is 40% higher than that of Karim's SUV. If Jalil's hatchback gets ga...

If n= , what is the units digits of n?

Druing a special promotion, a certain filling station is offering a 10% discount on gas purchased after the fi...

To fill a number of vacancies, a company must hire 3 officers from 6 applicants, and 2 managers from 4 applica...

At a college football game, 4/5 of the seats in the lower deck of the stadium were sold. If one-fourth of all...

A department store receives a shipment of 1,000 shirts, for which it pays $9,000. The store sells the shirts a...