<p>I took this test and got an 800 but I have questions about a few of the problems. </p>
<p>Number 37 page 180
Number 41 page 181
Number 44 page 182</p>
<p>Can someone please give the explanations for the correct answers to these problems?</p>
<p>sorry cant help you on those but can you help me on number 36 on page 180? thanks</p>
<p>Number 36 is just a probability problem that asks what's the probability of 4 events happening. It's just .2^4 or .0016 since all the events are independent. That is, if one thermometer fails, it has no effect on another's failing.</p>
<p>thanks! 10 characters</p>
<ol>
<li>Geometrically: if (a) and (b) start in point O, (b-a) connects their ends.
How does (b-a) and its length change when (a) rotates around O?
============</li>
</ol>
<h1>41. Line l can be parallel to only one plane out of n.</h1>
<ol>
<li> A cone vertical cross-section through its apex is a triangle.
A parallel cross section "cuts out" a similar triangle.
"H" is a hight of the large triangle.
There are different ways to continue.</li>
</ol>
<p>H/? = 6/?</p>
<p>Or drop a couple of perpendiculars to the base:
H/? = 8/?</p>
<p>Alright, that clears things up for me, thanks.</p>