The 1st question’s answer choices are 3,0,75,8 The 2nd questions answer choices are 0,1,61,63
The third question’s answer choices are 2,3,9,69

PLZ HELP

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