Find the sum of first 200 counting numbers.

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?