I need help with algebra2

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

Find the domain and range of the following function f(x) = 51x - 21+ 4

What is the solution to the equation e3x=12? round your answer to the nearest hundredth