PLEASEE HELP ME WITH THIS QUESTION!!!

What is this inequality notation? t is less then or equal to 2

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

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi