94. x is more than 3 but less than 100, ask how many prime squres are in 3/x. ( 9 and 25 only)
95.two identical square in one rectangular, the perimeter of rectangular is 18xsqurt2, ask the perimeter of each square(old jj, but old jj but rhombus instead of identical square)
102.PS比较大小 R=-根号下(0.0025), S=-根号下(1/1600), T=-[根号下(0.04)]/2 我的答案:T 103. One ball will 0drop from a certain height. The height it will reach after rebounding from the floor is 75 percent of the previous height. The total travel is 2146cm when it touchs the floor on third time. Ask for the original height? a)400cm b)500cm c)600cm d)700cm e)800cm Answer: c
104.Jan s 160. change 4w/3 to 5w/4. my Answer: D, 12