I have a clue of what the answer might be but I’m confused and need help

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

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

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?