(EASY) The amount of propane in a tank that stores propane for heating a home decrease from 500 gallons to 344 gallons. 1. Use a graph or the slope formula to show the average rate of change in the amount of propane used over the 45-day period.

PLEASE USE A SLOPE EQUATION, WILL GIVE BRAINLIEST

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)