Quentin deposited 500. In his savings account in two years it grew to $561.80 what percentage was the simple annual interest rate on his savings account

Mahnoor randomly selects times to walk into a local restaurant and observe the type of music being played she found that the restaurant was playing country 11 times rock & roll 17 times and blues 8 times use the observed frequencies to create a probability model for the type of music the restaurant is playing the next time mahnoor walks in.