The demand for water during a fire is often the most important factor in the design of distribution storage tanks and pumps. For communities with populations less than 200,000, the demand Q (in gallons/min) can be calculated by:
Q = 1020√P(l - 0.01√P)
where P is the population in thousands. Set up a vector for P that starts at 10 and increments by 10 up to 200. Use element-by -element computations to determine the demand Q for each population in P.