Joannie lent 200$ to her sister. four years later, her sister repaid her in full with 228$. what a simple annual interest rate did joannie's sister pay?

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Tell whether the two rates form a proportion