28. Each person will get 2 pieces. 1/6=2/12 29. Each teacher will get 9 cookies. 1/4=(sorry, I'm not sure) 30. Each student will get 4 slices.1/16=4/64 31. She has made five. Hope this helped :)
A - area of a trapezoid; a, b - two bases. A = h * ( a + b ) / 2 / * 2 ( we have to multiply both sides by 2 ) 2 A = h *( a + b ) 2 A = h a + h b h b = 2 A - h a b = ( 2 A - h a ) / h b = 2 A/h - a Answer: D )
