If the sales tax in your town was 7%, and you paid $1,400 in sales tax on your new car, then what was the original price of the car? And what is the total price including sales tax?
Please be accurate of your answer and explain.

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)