1. ( ) EXAMPLE 1 Evaluating Square Roots a. 36 = 6 6 because 2 = 36 . b.
= 6 6
because 2
= 36 . b. 64 –
= –8
because
(–8) 2
= 64 .
because
( ) 2 5 c. 4 25 2 5 = 4 25 = . d.
0.81
= 0.9
because
(0.9) 2
= 0.81 .

2. EXAMPLE 2
Standardized Test Practice
SOLUTION 2
is closer to 9 or 10.
You can use a number line to approximate 95
nearest whole number. Because
to the
is between 9 and 10,
you need to decide whether
Find 9.5. You can calculate that 9.5 = and ( )
= 95.

3. EXAMPLE 2
Standardized Test Practice 95
As shown on the number line,
is between
90.25 and
100
, so it has a value between 9.5 and 10. Therefore,
is closer to 10 than it is to 9. 95
ANSWER
To the nearest whole number,
10.
The correct answer is C.

4. GUIDED PRACTICE
for Examples 1 and 2
Find or approximate the square root to the nearest integer. 1. 4
ANSWER 4 = 2 2.
ANSWER =

5. GUIDED PRACTICE
for Examples 1 and 2
Find or approximate the square root to the nearest integer. 3. 36 –
ANSWER = –6 36 – 4. 81 –
ANSWER 81 – = –9

6. GUIDED PRACTICE
for Examples 1 and 2
Find or approximate the square root to the nearest integer. 5. 23
ANSWER = 23 5 6. 41
ANSWER 41 = 6

7. GUIDED PRACTICE
for Examples 1 and 2
Find or approximate the square root to the nearest integer. 7. 25 81
ANSWER
= 1 25 81 8.
0.36
ANSWER
0.36 = 1