Officials at the sucide prevention center know that 2% of all people who phone their hotline actually attempt sucide. A psychologist has devised a test to help identify those callers who will actually attempt sucide. She found that 80% of the people who will attempt sucide attain a positive score on this test, but only 5% of those who will not attempt sucide attain a positive score on this test. If you get a positive identification from a caller on this test, what is the probability that he would actually attempt sucide? (Hint: Set up a tree then fill in the matrix shown below with the appropriate numbers.)

At river bank, checking account customers earn 0.75% interest a month on their account balances, pay no service fees for writing checks, and pay a monthly $2.00 financial charge. calculate the income earned in one month on the checking account for a customer with an account balance of $1,000. a. $4.25 b. $5.50 c. $6.75 d. $7.25 checking account earnings at baker’s bank are expressed by the equation: i = -0.09x + 10.2. while the earnings at elite bank are modeled by: i = -0.02x + 7.5. in both cases, x is the number of checks written. at what number of checks will elite bank start generating more checking account income than baker's bank? a. 12 b. 25 c. 39 d. 42 emilio’s checking account had a balance of 728.32 at the beginning of the week. he wrote checks for the following amounts throughout the week: $99.48, $33.50, $18.23, and $72.05. he also deposited his paycheck in the amount of $1,109.90. what is his account balance at the end of the week? a. $1,192.35 b. $1,222.86 c. $1,540.52 d. $1,614.96