The graph below models the value of a $20,000 car t years after it was purchased, BEBE
Value of Car
Ту
20000
18000
16000 +
14000
12000
10000
8000
6000
4000
2000
2 4 6 8 10 12 14 16 18
Years
Which statement best describes why the value of the car is a function of the number of years since it was
purchased?
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If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)