Calculus 8th Edition

1. The longer the consumption the greater the amount used. The domain is [0,$\infty$) because usage time cannot be negative. The range is also [0,$\infty$) because the consumption can only be positive. 2.Assume the maximum speed of an airplane is 885 km/h, then the range of the flight velocity is [0,885]. At low speeds a plane has greater drag to generate lift. At mid speeds it has the lowest drag and at high speeds it also has greater drag due to air. 3. The projectile starts at an initial height (say 100m), it then travels to it's greatest height (say 2400m) and then to it's lowest height, 0m - all in 25s. So the range is [0m,2400m] and the domain is [0s,25s]