2. Lachlan saves 1000 chf in an account that earns 5% interest every year. How much will he have after the first year? After the second year? 3. Katya changes 250 euro to Russian Rubels. The conversion rate is 60 Rubels to 1 euro. How many Rubels will she have?
4. Tunahan buys a new jacket which originally cost 200 chf and is on a 15% discount. How much does the jacket cost after the sale?
HEL PLS MAT

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)