What is the ratio equivalent to 24: 15?

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

What is the 12th term of b(n)=-4-2(n-1)

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