The power, P (watts), of a car engine is proportional to the square of its speed, s (m/s) When s=30, P=1260
Work out the power when the speed is 25m/s

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