There are 294 students in the senior class. four of the students will be chosen to be the president, vice-president, secretary, and treasurer of the class. how many different ways can this happen? there are different ways to choose the officers.

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?