Story Elena and Lin plan to sell a service at market day. Elena is making signs and will be charging her customers a $3 fee plus $0.50 per letter. Lin is making t-shirts and will be charging a $5 fee and $0.25 per letter. At what number of letters does Elena's service become more expensive?

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.