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Mathematics, 21.06.2019 15:00
Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?
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Mathematics, 21.06.2019 19:00
Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)
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Mathematics, 21.06.2019 21:10
Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.
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Mathematics, 21.06.2019 22:30
Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4
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