What rational numbers have square roots?

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Now Playing:Determine square roots of rational numbers– Example 1

Use the graph below to determine a rational number with a square root between 4 and 5.
Use the side lengths below to estimate and calculate the area of each square.
1. 5.2 cm
2. 0.027 km
Find out if each of the following rational numbers is a perfect square.
1. $\frac{{81}}{{16}}$
2. 0.1
3. 0.01
4. $\frac{5}{{14}}$
Evaluate.
1. $\sqrt {361}$
2. $\sqrt {2209}$
3. $\sqrt {0.0169}$
4. $\sqrt {5.76}$
Calculate.
1. $\sqrt {56}$ , to the nearest tenth
2. $\sqrt {3.7}$ , to the nearest hundredth
3. $\sqrt {0.96}$ , to the nearest hundredth
4. $\sqrt {0.066}$ , to the nearest hundredth