Erica can run 1/6 start fraction, 1, divided by, 6, end fraction of a mile in a minute. her school is \dfrac23 3 2 start fraction, 2, divided by, 3, end fraction of a mile away from her home. at this speed, how long would it take erica to run home from school?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

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)