(√840 ÷ 348.19) * (456.09 ÷ √360) * ? * 7.91= √2300
A. 3
B. 5
C. 7
D. 1
E. 8
Sol:
(√840 ÷ 348.19) * (456.09 ÷ √360) * ? * 7.91 =
√2300
29/348 * 456/19 * 8 * ? = 48
? = 3
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