<p>how do u get the answer:
If 18<em>sqrt(18)=r</em>sqrt(t), where r and t are positive integers and r > t which of the following could be the value of r*t?
A) 18
B) 36
C) 108
D) 162
E) 324</p>
<p>the answer is c) 108</p>
<p>how do u do that problem?</p>
<p>Factor the sqrt18 to square sqrt9*2, which equals 3sqrt2.
The 3 comes to the outside, because the sqrt9=3, since 3 is now outside of the sqrt, the 3 multiplies with 18 to make 54. 54=r and t=2, thus 54x2=108, your answer.</p>
<p>omg thxs so much i cant believe i didnt think of that...</p>