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06H
Posted:
Wed Apr 03, 2013 9:19 pm
by sxk1693
Test was much easier than 05H...Saw a 49 point increase and that was with 3NCS...
37. A band piece lasts 5 min 35 s when played at a 63 beats/min tempo. What tempo is needed if the piece duration is 6 min. ANS: 59
46. A 55 gal barrel is 45 in tall. What minimum number of 12 in tall buckets of similar shape to the barrel are needed if the contents of 3 barrels are transferred to the buckets. ANS: 159
50.
58.
59.
Thanks.
Re: 06H
Posted:
Wed Apr 03, 2013 9:28 pm
by darksaber21
Re: 06H
Posted:
Wed Apr 03, 2013 9:34 pm
by darksaber21
Re: 06H
Posted:
Wed Apr 03, 2013 9:39 pm
by 101dalmatians
50. Well look at the picture. There is a frustum, small cone, and big cone
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Volume of big cone = [unparseable or potentially dangerous latex formula]
Volume of Frustum = [unparseable or potentially dangerous latex formula]
Volume of small cone = [unparseable or potentially dangerous latex formula]
It is given that the volume of small cone = volume of frustum
So,
[TI 89 SOLVER]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Now, store this algebraic val. of x in your calc.
Notice that the volume of the big cone minus the volume of the small cone is equal to the volume of the frustum.
So,
[TI 89 SOLVER]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Now, plug in this value of z and solve the first equation AGAIN.
So,
[TI 89 SOLVER]
[unparseable or potentially dangerous latex formula]
You get [unparseable or potentially dangerous latex formula]
Re: 06H
Posted:
Wed Apr 03, 2013 9:44 pm
by 101dalmatians
Re: 06H
Posted:
Thu Apr 04, 2013 3:24 pm
by 101dalmatians
59: SKIP - no use doin it (unless ur nsguy)
Re: 06H
Posted:
Thu Apr 04, 2013 5:22 pm
by darksaber21
Why? It's pretty easy.
First, take the derivative of the function, which is:
[unparseable or potentially dangerous latex formula]
Now, since the maximum point, where the slope is zero, is located at x = 6, we plug in 6 for x, and solve for n, which should get you 6.00
Re: 06H
Posted:
Thu Apr 04, 2013 7:44 pm
by sxk1693
[quote="darksaber21"]Why? It's pretty easy.
First, take the derivative of the function, which is:
[unparseable or potentially dangerous latex formula]
Now, since the maximum point, where the slope is zero, is located at x = 6, we plug in 6 for x, and solve for n, which should get you 6.00[/quotet
Whoops! Typed the derivative wrong onto my calculator...
For 59, I read z-axis as x-axis so I thought the problem was simple as [unparseable or potentially dangerous latex formula]. I still don't get how to do it though.
Re: 06H
Posted:
Thu Apr 04, 2013 8:23 pm
by darksaber21
Re: 06H
Posted:
Sun Apr 07, 2013 11:35 am
by 101dalmatians
Ok what does it mean by the x-z plane on 59??? I mean I have heard of the x-y plane
Re: 06H
Posted:
Sun Apr 07, 2013 12:03 pm
by darksaber21
I think I was looking at the wrong problem this whole time, hehe.... sorry.
The x-z plane is the plane coming in and out of the page that is parallel with the x-axis on the page.
Re: 06H
Posted:
Sun Apr 07, 2013 3:16 pm
by sxk1693
I know what an x-z plane is. Do you just find the region revolved around the axis and divide that by 2?
Re: 06H
Posted:
Sun Apr 07, 2013 6:38 pm
by 101dalmatians
Re: 06H
Posted:
Sun Apr 07, 2013 6:41 pm
by 101dalmatians
Re: 06H
Posted:
Sun Apr 07, 2013 7:20 pm
by nsguy1350
Re: 06H
Posted:
Sun Apr 07, 2013 8:22 pm
by 101dalmatians
Re: 06H
Posted:
Sun Apr 07, 2013 9:15 pm
by nsguy1350
Re: 06H
Posted:
Sun Apr 07, 2013 9:24 pm
by sxk1693
Can someone answer my question?
Re: 06H
Posted:
Sun Apr 07, 2013 10:12 pm
by nsguy1350
Re: 06H
Posted:
Mon Apr 08, 2013 9:09 pm
by sxk1693
Re: 06H
Posted:
Mon Apr 08, 2013 10:14 pm
by 101dalmatians
Re: 06H
Posted:
Mon Apr 08, 2013 10:40 pm
by nsguy1350