2. A.

3. Square root of169 = +- 13.

The square root of 28900 = +- 170

The square root of 0.0256 = +-0. 16

4. 1 under the root number =+- 1.

-4/9 under radical sign =-2/3

(-5) 2 under radical number =+-5.

(6 under the root sign) 2 = 6

5. Solution: The telephone pole is vertical to the ground.

Triangle ABC is a right triangle.

2 2 2 2

According to Pythagorean Theorem, AB = (6m)-(3m) = 27m.

AB = 5.2

6. The square of the height of an isosceles triangle = the square of 2-the square (1/2 * 2).

= 3

High is 3 under the root sign.

Area = 1/2 * bottom * height

Under the root sign = 1/2 * 2 * 3

= 1.34