<p><a href="http://www3.0zz0.com/2013/07/19/08/531233045.png%5B/url%5D">http://www3.0zz0.com/2013/07/19/08/531233045.png</a> </p>
<p>? x>0 which of the following is equivalent is it a plug in equation</p>
<p>For the first question, just plugin in values.
I used x=25</p>
<p>X^3/2 is the same as (sqrt x)^3</p>
<p>So (sqrt 25)^3 = 125</p>
<p>Plug in the selected value of x (preferably a square) and check to see which of the rules work. They all work.</p>
<p>For the first, u can either plug values in and check true like the above post did, or if u have decent algebra, u can simplify each expression and find they all equal x^(3/2).
For the second, i would have to work that out, but an educated guess can quickly give u the answer. U can cross out D and E cuz u know ‘h’ has to be less than 16 since the circles arent vertically tangent. Now an educatee guess can lead u to B. U know a diameter is 8. Now u want the above portion which you could probably guess will be in decimals. Basically it makes no sense for the answer to be in the form x+12 where x is any number</p>
<p>Ok i got it. If u connect the centers of all thr circles, u can see an equilateral triangle. Meaning angle BOC is 60 where O is the center of the top circle. Now consider triangle BOC, u can find the height now. U now have all the info u need to find h</p>
<p>Scratch my previous post, sorry. Just realized my mistake. I assumed the dots on the circumference were horizontally colinear. Lol. You have to find the distance OA. To find that you have to consider the triangle formed by connecting all the centers. Now find the height of that triangle which is OA. This should come out to be 4*sqrt(3). now add 8 because u have a radius above OA and a radius below OA connecting OA connecting OA to l and m respectively.</p>
<p>is this from dr.chung’s SAT ii math test? i saw this problem in his math book. why is this question on college board? ***? strange…</p>