Brian invests £8300 into his bank account. He receives 1.4% per year compound interest.
How much will Brian have after 7 years?
Give your answer to the nearest penny where appropriate.

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