Roberto measures his garden to be 10 ft by 12 and a half feet he plants vegetables and 1/2 of the garden what is the area of his vegetable garden

Garden area = length*width

... = (12.5 ft) * (10 ft)

... = 125 ft^2

Vegetable area = (1/2) * Garden area

... = (1/2) * 125 ft^2

... = 62.5 ft^2

The area of Roberto's vegetable garden is 62.5 ft^2.