$\"\"$

The expression is $\"\"$ .

The perfect square less than 78 is 64.

The perfect square greater than 78 is 81.

The compound inequality is $\"\"$ .

$\"\"$ (Identify perfect squares closest to 78)

$\"\"$ (Take positive square root of each side)

$\"\"$ (Write 64 as $\"\"$ and 81 as $\"\"$ )

$\"\"$ (Cancel squares and roots)

81 is closer to 64 than to 64, so the nearest integer, $\"\"$ .

$\"\"$

The square root to the nearest integer is $\"\"$ .