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Middle School Math
Matemáticas
Middle School Math
Decimales

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Decimales
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 1 You do an experiment to collect data on earthworm behavior. You test the hypothesis that "If a worm is put into a terrarium, it will begin to bury itself within10seconds." After analyzing the data you report that the probability that a worm will begin to bury itself within 10 seconds is0.75. Based on this information, what is the probability that the next two worms in a row will "bury within 10 seconds?"
 2 Pure water boils at 100C at sea level. Now you may recall that if a solute is added to water it increases the boiling point slightly. One day, William decided to see if this was really true (he didn't believe it). He added some salt to a beaker of water and used an accurate thermometer to measure the temperature at which the water boiled. He found that the boiling point was raised to101.5C. He had measured the boiling point of pure water earlier and found it to be99.7C by his thermometer. How manyC did the boiling point increase in his experiment?
 3 A 10-kg ball of iron is put in a freezer at-47.3C para48hours. Then it is removed and put in an oven to undergo a mechanical test. Over the course of the test the temperature rises. At the end of the test, the temperature of the ball is206.4C. What was the temperature change?
 4 * Esta es una hoja prehecha.Utilice el enlace arriba de la página para un imprimible.
 5 Mr. Physics has just told the class that there is a proportional relationship between cause X and response Y. In fact it is well known (at least on Mr. Physics' planet) that every time cause X goes up two units, response Y goes upfive and seven tenthsunits. Knowing this, if cause X increases by43units, by how many units will response Y increase? Round your answer to the nearest number of units.
 6 Una clase cultivó50zanahorias en la arena y50in clay. After6weeks of growth they compared the plants to see which soil condition allowed the most root growth. The50de la arena tenía una masa total de20.1g and the 47 from the clay (3 died) had a mass of16.5g. What was the average root mass per plant from each of the experimental groups? Round your answer to the nearest thousandth of a gram.

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