3. a blueprint for a house has a scale of 1 : 35 (in : ft). a wall in the blueprint is 3 inches. what is the length of the actual wall? ( (1 point). 105 feet. 8.75 feet. 8.75 inches. 1,260 feet. 4. a microscope shows you an image of an object that is 80 times the object’s actual size. therefore, the scale factor of the enlargement is 80. an insect has a body length of 7 millimeters. what is the body length of the insect under the microscope? (1 point). 56 millimeters. 560 centimeters. 5,600 millimeters. 560 millimeters.