How many square feet of grass are there on a trapezoidal field with the height of 75 ft and bases of 125 ft and 81 ft?

To find the area of a trapezoidal field, you can use the formula: ( \text{Area} = \frac{1}{2} \times (b_1 + b_2) \times h ), where ( b_1 ) and ( b_2 ) are the lengths of the two bases and ( h ) is the height. Plugging in the values:

[ \text{Area} = \frac{1}{2} \times (125 , \text{ft} + 81 , \text{ft}) \times 75 , \text{ft} = \frac{1}{2} \times 206 , \text{ft} \times 75 , \text{ft} = 7750 , \text{sq ft}. ]

Thus, there are 7,750 square feet of grass on the trapezoidal field.