QuestionAugust 26, 2025

A. Communicate and Justify How do you think Sofia used Nora's results to make her estimate? Thinking and Reasoning Communicate and Justify Explain how to represent your best estimate as 8 rational number in the form (a)/(b) where a and 6 are whole numbers. B. Choose Efficient Methods Find a closer estimate for the side lengt of a square with area 10 units.Use number sense to make good estimates. Then use a calculator to check your estimates efficiently.

A. Communicate and Justify How do you think Sofia used Nora's results to make her estimate? Thinking and Reasoning Communicate and Justify Explain how to represent your best estimate as 8 rational number in the form (a)/(b) where a and 6 are whole numbers. B. Choose Efficient Methods Find a closer estimate for the side lengt of a square with area 10 units.Use number sense to make good estimates. Then use a calculator to check your estimates efficiently.
A. Communicate and Justify How do you
think Sofia used Nora's results to make her
estimate?
Thinking and Reasoning
Communicate and Justify Explain how to represent your best estimate as 8
rational number in the form (a)/(b)
where a and 6 are whole numbers.
B. Choose Efficient Methods Find a closer
estimate for the side lengt of a square
with area 10 units.Use number sense to
make good estimates. Then use a calculator
to check your estimates efficiently.

Solution
4.5(290 votes)

Answer

\frac{31}{10} Explanation 1. Estimate the Side Length The area of a square is given by A = s^2, where s is the side length. For an area of 10, estimate s by finding \sqrt{10}. 2. Use Rational Numbers for Estimation Approximate \sqrt{10} using rational numbers. Since 3^2 = 9 and 4^2 = 16, \sqrt{10} is between 3 and 4. A closer estimate is \frac{10}{3} \approx 3.33. 3. Refine the Estimate Test \left(\frac{10}{3}\right)^2 = \frac{100}{9} \approx 11.11. This is slightly more than 10, so try a smaller fraction like \frac{17}{5} \approx 3.4. 4. Verify with Calculator Calculate \left(\frac{17}{5}\right)^2 = \frac{289}{25} \approx 11.56. Try \frac{31}{10} = 3.1. 5. Final Check Calculate \left(\frac{31}{10}\right)^2 = \frac{961}{100} = 9.61. This is close to 10, confirming \frac{31}{10} as a good estimate.

Explanation

1. Estimate the Side Length<br /> The area of a square is given by $A = s^2$, where $s$ is the side length. For an area of 10, estimate $s$ by finding $\sqrt{10}$.<br /><br />2. Use Rational Numbers for Estimation<br /> Approximate $\sqrt{10}$ using rational numbers. Since $3^2 = 9$ and $4^2 = 16$, $\sqrt{10}$ is between 3 and 4. A closer estimate is $\frac{10}{3} \approx 3.33$.<br /><br />3. Refine the Estimate<br /> Test $\left(\frac{10}{3}\right)^2 = \frac{100}{9} \approx 11.11$. This is slightly more than 10, so try a smaller fraction like $\frac{17}{5} \approx 3.4$.<br /><br />4. Verify with Calculator<br /> Calculate $\left(\frac{17}{5}\right)^2 = \frac{289}{25} \approx 11.56$. Try $\frac{31}{10} = 3.1$.<br /><br />5. Final Check<br /> Calculate $\left(\frac{31}{10}\right)^2 = \frac{961}{100} = 9.61$. This is close to 10, confirming $\frac{31}{10}$ as a good estimate.
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