Question

#1 what is 18 in simplified radical form? Answers: A. 9 and 2 B. 2 and 9 C. 3 and 2 D. 2 and 3   #2 What is  28 in simplified radical form?   A.  2 and 5    B.    2 and 7    C. 7 and 2       D.   4 and 7   #3 What is  252  in simplified radical form?   A. 21 and 12    B. 12and 21 C. 7 and 6 D. 6 and 7                                                                                                                                                                       #4 A square fishpond has an area of 68 square feet. To the nearest tenth, what is the length of one side of the fishpond?   A. 8.2 ft   B. 9.4 ft   C. 17.0 ft   D. 34.0 ft  #5 A square-shaped billboard has an area of 295 square feet. Christy wants to put lights around the entire perimeter of the billboard. 
Approximately how much frame does she need?   A. 12 feet   B. 17 feet   C. 69 feet   D. 74 feet

Answer 1

1. $\sqrt{18}= \sqrt{9*2}= 3\sqrt{2}$

Answer: C

2. $\sqrt{28}=\sqrt{4*7}=2\sqrt{7}$

Answer: B

3. $\sqrt{252}= \sqrt{36*7}=6\sqrt{7}$

Answer: D

4. $68ft^2=\sqrt{68}\approx8,3$

Answer: A

5. $252ft^2=\sqrt{252}\approx17,17$ 

BUT she want it all around so:

$17,17*4=68,68\approx69$

Answer: C