As prt of a training program, staff at a testing lab applied a screening test to 500 blood samples known to contain HIV. The test was postive for 489 blood samples and negative for 11 samples. as of the same training program, the staff also applied the screening test to 500 other blood samples known to not to contain HIV. The test was positive for 37 blood samples and negative for 463. a. When a new blood sample arrives at the lab, it will be tested to determine whether HIV is present. Using the data from the training program estimate the probability that the screening test would be positive when it is applied to a blood sample that does not contain HIV.
b. Among the blood samples examined in the training program that provided positive screen results for HIV what proportion actually contained HIV?

Which of the following circles have their centers in the third quadrant? check all that apply.

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

In the picture below, line pq is parallel to line rs, and the lines are cut by a transversal, line tu. the transversal is not perpendicular to the parallel lines. note: figure is not drawn to scale. which of the following are congruent angles?