UIL 2012 C Questions

[redhawk2015]

My first ever 200 (228), so the practice is helping.



A few questions:

#37: Converted the roll length into centimeters...is this a scaling problem? What do I do next?

#38: Is there a formula for this?

#46: Is this another scaling problem? Or do I "knead" to know the formula for surface area of a doughnut?

#47: I have a TI-84+. Is there an option for Inverse Regression, or is there another way to do this?

[007math]

XD I couldn't help smile at that pun.

#46: You don't know the formula for surface area of donut? I swear this was basic elementary school stuff. [unparseable or potentially dangerous latex formula] where r_1 is smaller radius and r_2 is bigger radius. Read on-->

Ok, that was a joke. It is one of those scaling problems. [unparseable or potentially dangerous latex formula]; solve for x.

[BlasianAsian]

Oh my god. I'll never be able to eat a donut the same ever again. D=

[Shawn]

37) I would use linear regression
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

47) Just manipulate your independent variable.
So for example the first entry would be:
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Continue this and do the same with the given to get the appropriate y value.
If you don't understand let me know.

[smeag]

ok, is there a format for questions 36-38? (ex. trajectory, scaling, etc.)

[Shawn]

To the best of my knowledge, no. But, just as I stated on your "how to get to 300" thread, the questions recycle, so in theory yes. There are only so many types of questions covered. I am going to try to do the physics problem now (it has been awhile).

[Shawn]

38) Talk about over thinking....
Start by finding height of ramp
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Now apply kinematics change in height equation.
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Equation solve:
[unparseable or potentially dangerous latex formula]
No acceleration in horizontal
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]