More CB Ques's

<p>once again, i, crappy at math, lol need more help…thanks!</p>

<li>the acme plumbing company will send a team of 3 plumbers to work on a certain job. the company has 4 experienced plumbers and 4 trainees. if a team consists of 1 experienced plumber and two trainees, how many diff. such teams are possible?</li>
<li>if p, r, and s are three different prime numbers greater than 2, and n=p x r x s, how many positive factors, including 1 and n, does n have?</li>
<li>h(t)= c-(d-4t)^2
At time t=0, a ball was thrown upward from an initial height of 6 feet. until the ball hit the ground, its height, in feet, after t seconds was given by the function h above in which c and d are positive consonants. if the ball reaches its maximum height of 106 feet at time t=2.5, what was the height, in feet, of the ball at time t=1?</li>
</ol>

<p>pg. 672-13
pg. 673-16</p>

<li>if the sum of the consecutive integers from -22 to x, inclusive, is 72, what si the value of x?</li>
</ol>

<p>pg. 674- 19, 20</p>

<p>i know that’s a lot…but any help you give would be greatly appreciated :)</p>

<p>#15[/url</a>] See posts 2 and 14
[url=<a href="http://talk.collegeconfidential.com/showthread.php?t=80462&page=2&pp=20%5D#17%5B/url">http://talk.collegeconfidential.com/showthread.php?t=80462&page=2&pp=20]#17[/url</a>] See parts of posts 25 and 27
[url=<a href="http://talk.collegeconfidential.com/showthread.php?t=76470%5D#17">http://talk.collegeconfidential.com/showthread.php?t=76470]#17</a> and 18
See posts 6 and 7</p>

<p>I don't have a blue book, so I can't help on the ones with just page numbers</p>

<p>The other #18:
The sum of integers from -22 to x is 72
You know that the sum of integers from -22 to 22 is zero, since each negative and positive term cancels out. So start with 23 and work till you find the answer.
-22 to 23 -> 23
-22 to 24 -> 47
-22 to 25 -> 72
So x=25</p>

<p>(Could you tell me page numbers for the problem I answered and the ones I linked to?)</p>

<p>15- 656
17- 656</p>

<p>thanks a lot!</p>