Observe the Mathematical Bridge and estimate its span (length across the river) and height at the center. Even though it looks like an arch, the bridge is made entirely of straight timbers. Using your estimated measurements, try to model its shape with a parabolic equation of the form y=ax2+bx+cy=ax2+bx+c, assuming the highest point is at the center. Discuss why the straight beams can still form a stable structure and how forces like compression and tension act on different parts of the bridge.