15. a certain guy has six shirts, 7 pairs of pants, and 5 pairs of shoes. all of these are color coordinated, meaning any shirts goes with any shoes and pants. if decides to wear a different outfit consisting of the three items each day, how many days will go by before he repeats the same outfit

210 days

at 0 hours the plane has 422,000 gallons of gas.

after 2 hours it has 369,250 gallons.

subtract to find the difference and then divide by 2 hours:

422000 – 369250 = 52750 /2 = 26,375 gallons per hour.

can also do the full 16 hours:

the plance used 422,000 gallons in 16 hours:

422,000 / 16 = 26,375 gallons per hour.