What if the third term of an 12-term series is 14 and the terms are increasing by 5? What is the series? What is the sum?

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

Me because some of question i don’t understand

Ineed with the quizzes in apex mathematics ii