What is 13/30 divided by 17,can anyone please help me

What is the value of x divided into y - z if x = 32, y = 4, and z = 2 3/4?

If f(x)= 3x+6 which of the following is the inverse of f(x)

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