31 exponent for 31 because i said 31

What could explain what happened when the time was equal to 120 minutes

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

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have