You deposit $400 in an account. The account earns $18 simple interest in 9 months. What is the annual interest rate?

Just tell me how to set up the equation.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.

Determine which postulate or theorem can be used to prove that lmn =nmo