[計量] BB Test7 Sec.4 No.9,28
請問一下兩題題目意思
no.9
n=7*19^3
column A:The number of distinct positive factors of n
column B:10
Ans:B
no.28
By weight, liquid A makes up 7.0 percent of solution I and
14.5percent of solution II. If 3 grams of solution I is mixed with
2 grams of solution II, then A accounts for what percent of the weight
of the resulting solution?
(A)6.09% (B)10% (C)10.75% (D)21.5% (E)50%
Ans:B
謝謝解答~
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