The sides of a square region,measured to the nearest centimeters ,are 6 centimeters long. The least possible value of the actual area of the square region is
36.00 sq com
35.00 sq com
33.75 sq com
30.25 sq com
25.00 sq com作者: rudder86 时间: 2010-8-9 20:31
The sides of a square region,measured to the nearest centimeters ,are 6 centimeters long. The least possible value of the actual area of the square region is
正方形的边四舍五入到最近的厘米时6厘米，最小的面积可能是？
还有一题：最后一句话看不懂
An object thrown directly upward is ata a height of h feet after t seconds,where h =-16(t-3)^2+150
At what height, in feet ,is the object 2 seconds after it reaches its maximum height?
6
86
134
150
214
抛物线的顶点是（-3,150）所以its max heitght 应该是150，但是2 seconds after 看不懂作者: zhuzhu123 时间: 2010-8-12 16:54
