Algebra 1 – Semester 1

Tips on how to successfully complete:

2.3.5 Practice: Modeling: Precision in Measurement

See next page for tips on the assignment itself.

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Precision in Measurement Practice Assignment

(s2e36090) Name:

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41,youRASSlcNME*r, .he)d 40v- wl w W4sa44 *r€arn;tfrn.You bought a table at a flea malket, qyfd you want to decorate it with tiles. Which typd6f tile have you chosen?

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1. \Mat is the area of vour table? (2 points)

2. Calculate the number of tiles you need to fill the area of the table, WllhSgllggrrd14S to the correct significant

figures: (2 points)

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What doyru knory?

Itlhet do )ou wanttofind out?

What Und of rnryc€tdo you expectl

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3. tlQur manv sionificant figures should you include in your two measurements? (2 points: 1 point for each

answer)

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&s $I\.L * o( $+gb) Tile area measurement:

4. Round your final answer to a whqle number of tiles, using the correct number of significant figures. (2 points)

assl"an.errensicoi (does nol Wpyg ryWp,,.q fu 4:,Wfr,tr"|f nDh/)Suppose you want to add an extension (a leaf) to the table. \ttr friend nrbasures the table quiikly with ameasuring tape and says the table is roughly 48 inches long. You measure the extension carefully with a rulerand find the extension to be 8.75 inches long.

^)',o5. Ho-w long is the table with the extension? frund your answer to the correct number of significant digits.(2 points: 1 point for the answer, 1 for rounding)a,) b)

\A/hy do you need to round this answer to the correct number of significant digits? (1 point)

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Find the Area of a Ruo:

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Suppose you find a rug to put under your table. You measure the rug with quarter-inch accuracy and find the

dimensions to be 49.25 inches by69.75 inches.

6. Calculate the area of the rug, gi!!gg!19g1glj1g to the correct number of significant figures. (1 point)

7. Why is this a misleading measurement for the area o! the rug? (1 point)

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8. Round the area of the rug lgllhe correct number of significant figures. (2 points)

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Take Time to Reflect:

Realistically, what tool would you use to measure furniture? (1 point)

How accurate would you need your measurements to be? (1 point)

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