1.  Let's say you have a molecule that is made entirely out of four different kinds of subunits called As, Ts, Cs, and Gs. In this molecule, the number of Cs equals the number of Gs and the number of Ts equals the number of As. If one of these molecules is analyzed and found to consist of23% As, then what percent of the molecule is made up of Gs?

 2.  According to the Internal Revenue Service,18.9percent of the people who fill out federal income tax forms leave out pertinent information. Having to send back tax forms slows down the operation of the IRS. According to IRS figures, how many people out of five thousand will leave out pertinent information on their forms (round to the nearest person)?


3.  When our teacher handed out our math test, she told us to omit problems 4, 7, 9, 11, and 15. There were thirty problems on the test. What percent of the problems did we have to solve (to the nearest percent)?

 4.  There is a herd of ibex (kind of like antelope) out on the range. Fiftyone percent of the ibex are male. If the herd consists of1,042individuals, how many are female?


5.  Ifnineteen and two hundredthspercent of the volume of gas in a storage tank is oxygen, then all the other gases in the tank make up what percent of the volume of the gases in the tank?

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