Apply your CIN in the bracketed spaces (the first digit is [a], the second digit is [b] , and so forth.) Use Math Editor to enter formulas and mathematical expressions. Problem Engineers have proposed a single-span suspension bridge across 8-km wide strait. The plan includes suspension towers 3[c]0 meters high at each end. Use the Trapezoidal approximation ( that is given by ) to estimate the total length of the cable (in meters)