A.
8 and 9

B.
9 and 10

C.
10 and 11

D.
84 and 85

Question

A.
8 and 9
 
 B.
9 and 10
 
 C.
10 and 11
 
 D.
84 and 85

anonymous · Answer

http://static.k12.com/packages4/files/media/mathml_4797873e8404af5f073873db0480fca48a08bbad_1.gif

anonymous · Answer

i will fan and give a medal

.sam. · Answer

First you have to find what number when squared is the narrowest range of $\sqrt{85}$

.sam. · Answer

For this, try $$\sqrt{84}$$
That doesn't give an integer 
try $$\sqrt{83}$$
That doesn't give as well, how about
$$\sqrt{81}$$
This is equal to 9, so 9 will be lower limit of $\sqrt{84}$

.sam. · Answer

The upper boundary you'll need to test is $\sqrt{86},\sqrt{87},\sqrt{88},\sqrt{89}...$
Try until you got an integer

.sam. · Answer

I think the closest you can get is $\sqrt{100}$ which is 10, so the answer is B

anonymous · Answer

What is the value of x?