Marc plots the point (1, 20) in a coordinate grid to show the number of minutes it takes him to walk 1 mile. Which ordered pair might Marc use to show how many minutes it takes him to walk 3 miles?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days