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Middle School Math
Mathematik
Middle School Math
Dezimalzahlen

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 Name _____________________________ Date ___________________
Dezimalzahlen
Ganze.

 1 Kaitlyn is designing a new hog watering system for a farm. There is a large tank that must store water above ground. In addition, the tank must be on stilts, so that vehicles can drive under it. She only has wood to make the stilts out of, so she wants to limit the total mass of the tank and water to a safe amount. She calculates that the support she designs will safely hold up a19,700kg mass. If the tank itself has a mass of3121.19kg, what volume of water (in liters) can it hold?
 2 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 upsix and eight tenthsunits. Knowing this, if cause X increases by42units, by how many units will response Y increase? Round your answer to the nearest number of units.
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 4 Two different rocks from near a recent volcanic eruption are compared. Sample A is a rock with a mass of600grams and a volume of328cm3, and sample B has a mass of855grams and a volume of518cm3. Which sample is denser and by how much? Round your answer to the nearest hundredth.
 5 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, Nicholas 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 to101.4C. 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?
 6 In the Bigtown environmental studies lab, a technician is analyzing water from the local river. She is measuring the pesticide concentration in the water. She analyzes the sample3Mal und die Messungen der Pestizidkonzentration betragen0.03mg/ml,0.15mg/ml and0.11mg/ml. What was the average of the three measurements? Round your answer to the nearest thousandth.

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