Pyramid Surface Area = (½ * Perimeter of Base * Slant Height) + Base Area
Perimeter of Base = 6 * 4 = 24 Base Area = 6 * 6 = 36
Pyramid Surface Area = (½ * Perimeter of Base * Slant Height) + Base Area Pyramid Surface Area = (½ * 24 * 6) + 36 Pyramid Surface Area = 72 + 36 Pyramid Surface Area = 108 square inches
She would multiply the rate by the years to find the average rise in water levels, or 1.8 times 6.2 = 11.16. To find the difference between the water levels, she would subtract -13.64 from 11.16.
