Answer:
1: the answer cannot be determined because it doesn't state how big the area is. 2: 2.28125 gallons 3: 61%
Step-by-step explanation:
2. first find the area of the figure in square centimeters. the top trapezoid is (4+14)/2 * 10 = 90 and the bottom triangle is 14*8/2=56, so the total area is 146 sq cm. 1 sq cm corresponds to 2.5^2 = 6.25 square feet irl, so 6.25*146=912.5, and if you divide that by 400, you get 2.28125 gallons
3: Because there are 4 semicircles, 18/4=4.5, so the area of each semicircle is 4.5 pi. Therefore the area of a whole circle is 9 pi, so the radius of the circle is 3. That means the diameter of the circle, which is also the side of the square, is 6, so the area of the square is 36. Therefore the percent of the design that is green fabric is:
18pi/18pi+36
= 56.52/92.52
= about 0.611, which rounds to 61%.
