If a certain number is decreased by 9, the results is 24 . What is the number?

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals