A photocopier can print 12 copies in 18 seconds. At this rate, how many copies can it print in 42 seconds?​

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