A research team is studying whether the energy from waves can be used to generate power. The team's idea is to use a buoy (which rises and falls with waves) attached by a cable to an anchor (which is stationary) to generate electricity through a pump embedded into the cable. The team determines that the typical wave at one potential site can be modeled using the function h(w) = 3 sin(0.09w) in which h indicates the height in feet. What is the amplitude of the wave