Ineed solving this quadratic function!

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet

Which function has the domain x> -11

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish