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2-100.

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 What would be a reasonable estimate of $\sqrt { 68 }$? Explain your thinking. After you have made an estimate, check your estimation with a calculator. Answer (a):$\sqrt{68} \cong 8.2 \text{ because } \sqrt{64} =8,\text{ so } \sqrt{68} \text{ must be a little higher.}$
 Repeat this process to estimate the values below.$\sqrt { 5 }$Answer b (1):$2.2$$\sqrt { 85 }$Answer b (2):Since square root of $81$ is $9$, then square root of $85$ is a little more$≈ 9.2.$$\sqrt { 50 }$Answer b (3):$7.1$$\sqrt { 22 }$Answer b (4):$4.7$