4 times what equals 32

Which of the following statement about pascal's triangle are true?

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

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