What approach do I use to find the polynomial

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?