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Chapter 4

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Sec 4-L

Percents andFractions

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Comparingand Ordering

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Percents andEstimation

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5. what process would you go through to decide whetherI or69% is greater?10

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Practice B

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Describe a process that you can use to find a decimal whose value is

berweenpt% and&/r!," ,3/ ,65;:"?3 gl-/0 ?t$u/aIs 6 centimeters greater than 5o/o of ameter? Explain.

Does 6% of apoundweigh more than an ounce? Explain'

Order the periods of time from least to greatest:

? otuminute 0.0004of a daY3

15. The table shows the portions of the U.S. population thatwere in Florida

in certain years.

Year 1860 1910 1960 2010

Portion of U.S. PoPulationin Florida

0.4s% 0.0082I

36

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a. Order the portions from least to greatest.

b. Since 1860, how has the population of Florida increased compared to

the population of the united States? why do you think this happened?

c. Do you think this will always happen? Explain yourreasoniug.

16. Arsenic is toxic to humans. The greatest amount of arsenic that is allowed in

drinking water is 10 parts per billion. A test shows thatasource of drinking

water contains 0.000b02% arsenic. Is this an allowable amount? Explain'

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