Abird refuge is shaped like a parallelogram with a base of 650 m and a height of 450 m. volunteers want to install birdhouses on the refuge. they divided up the refuge into regions, each approximately 25 m by 25 m, and plan to install one birdhouse in each region. which estimate best approximates the number of birdhouses that the volunteers will install on the refuge? question 1 options: 45 235 470 585