<p>confused with a math problem, your help would be appreciated. i know what the answer is but i don't understand HOW to get the answer. if you can explain how you figure out the answer, that'd be awesome :) </p>
<p>If x is an integer, which of the following is x^3?
a.) 2.7 x 10^11
b.) 2.7 x 10^12
c.) 2.7 x 10^13
d.) 2.7 x 10^14
e.) 2.7 x 10^15</p>
<p>Are those multiplication symbols or x's in the solutions?</p>
<p>Amazing, I was just doing this problem. (Seriously, my book is opened to page 440 in Princeton Review)</p>
<p>My solution was
2.7x 10^1 = 27 = perfect cube</p>
<p>So 10^(must be a multiple of 3) in order to be a perfect cube times (2.7 x 10^1)</p>
<p>So answer is C) which is 10^12 x (2.7x10^1)</p>
<p>if you do the math for all the problems, you will see that c is the only one with a cube root that is an integer.</p>