2. 职称英语
  3. The square root of 800 is between which of the following integers?A、21 and 25B、

The square root of 800 is between which of the following integers?A、21 and 25B、

游客2024-01-14  67
问题 The square root of 800 is between which of the following integers?
选项 A、21 and 25
B、24 and 28
C、27 and 31
D、30 and 34
E、33 and 37
答案 C
解析 The best solution here is to plug in the numbers from the answers until you find the range that works. 21×21=441, 24×24=576, 25×25=625, 27×27=729, 28×28=784, 30×30=900... and we do not need to determine the square of 31 to know that the square root of 800 is between 27 and 31.
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