For Problems 54-57, use Figure 1.75 to estimate the given

value for ?(?) = ?sin(?(? ? h)) + ?, which approximates

the plotted average monthly water flow of the Mississippi

River.

water flow (1000s of fto per second) 800 600 400 200 0 t (months) 1 2 3 4 5 6 7 8 9 101 1 12