What is the answer to 5 times 3/8

What term best describes a line ans a point that lie in the same plane

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

What’s the range cuz i can’t find it?