Answers by Matheeeny
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Answers by Matheeeny

Answers by Matheeeny
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(-1)^(n+1) + (-1)^n-1)=?
answered Oct 23, 2017
7 votes
75.0k views
True or false: the water on the earth today has been sustaining life for millions of years.
answered Sep 20, 2017
1 vote
66.6k views
1. By what are isotopes identified? A.mass numbers B.atomic masses C.atomic mass units D.average atomic masses And 2. Uranium atoms each have 92 protons.How many protons does each U-238 atom have?A.92
answered Aug 6, 2017
5 votes
184k views
The ratio of men to women in New York is 3:4. What is the fraction of men in NYC? A. 3/4 B. 1/4 C. 1/3 D. 3/7 I think it is b or c
answered Jul 14, 2017
0 votes
183k views
There are 376 stones in three piles. The second pile has 24 more stones than the first. The third pile has twice as many stones as the second. How many stones in each pile?
answered Jan 25, 2015
6 votes
204k views
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