What is 0.12 expressed as a fraction in simplest form?

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

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Twelve less than a number is at most 20