INEQUALTIES AND MEASUREMENTS
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Unit Overview
In this unit, you will use the procedure to solve multi-step equations to solve multi-step inequalities and graph solutions on the number line. You will then examine how to convert measurements using dimensional analysis, a method used often in scientific studies. The study of measurement ends with a look at the exactness of a measurement and how to allow for variances.
Solving Multi-step Inequalities
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Solving Inequalities (04:12)
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Stop! Go to Questions #1-8 about this section, then return to continue on to the next section.
Measurement
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What type of measurement is used to determine the amount of material to order?
Estimation because they just needed an estimate to order the material.
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What type of measurement is used to determine the amount that will be collected?
Exact, both numbers are used to state an exact amount determined.
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What type of measurement is used?
Approximation, this is as accurate as the measuring tape will show.
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Note: In determining the type of measurement, another factor considered is that the measurement is accurate enough to make the design on the computer.
Exact Number Needed -- Steel Beams (04:12) Adequate Estimates -- Wedding Food (01:12) Flexibility -- Travel Budget (01:59) Stop! Go to Questions #9-11 about this section, then return to continue on to the next section.
Relative Error
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Introduction: Error in Foam Making (01:57) Absolute and Relative Error -- Construction (03:02) Importance of Errors -- Emergency Room (01:58) Low Tolerance for Error -- Drag Racing (01:45) By changing the ratio to a percent we can see the greatest possible percent error in area, based on measurements to the nearest foot, is about 8%.
Stop! Go to Question #12 about this section, then return to continue on to the next section.
Measurement Conversions
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Practice Problem: Unit Conversion Factors (01:07) Performing Multiple Unit Conversions (03:50) Practice Problems: Unit Conversions (05:22) Stop! Go to Questions #13-21 to complete this unit.
