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Today,
05:15 PM
JeffM
replied to a thread
Throwing three different dices - probability of getting a six
in
Probability / Statistics
I meant to say, but somehow forgot, that my method was not that different from PKA's. I was more interested in tying it to basic definitions and...
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8 replies | 90 view(s)
Today,
05:08 PM
harrison
replied to a thread
scaling standard deviation
in
Calculus
Did you see the post before the one you quoted?
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5 replies | 62 view(s)
Today,
04:25 PM
pka
replied to a thread
Throwing three different dices - probability of getting a six
in
Probability / Statistics
Yes now it is correct. In Jeff's solution, he used a factor of one third in each term. O.K. but they all divide anyway.
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8 replies | 90 view(s)
Today,
04:16 PM
JeffM
replied to a thread
weird conic section problem
in
Intermediate/Advanced Algebra
That is very helpful to know where you are in your studies. Differentiation is the topic of differential calculus so answers involving...
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9 replies | 131 view(s)
Today,
04:10 PM
dr.trovacek
replied to a thread
Throwing three different dices - probability of getting a six
in
Probability / Statistics
I think I see the mistakes I made in my reasoning and also the difference between what is required and what I have calculated.The part of this...
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8 replies | 90 view(s)
Today,
03:56 PM
j-astron
replied to a thread
Probability in Business
in
Probability / Statistics
You might find a starting formula here https://en.wikipedia.org/wiki/Expected_value Obviously there is NO way we can give you more specific help...
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1 replies | 24 view(s)
Today,
03:42 PM
j-astron
replied to a thread
Uniform distribution & price
in
Probability / Statistics
X is a random variable that is your data usage in a month in GB (or Go, whatever the **** those are. I'll use GB). X is uniformly distributed between...
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1 replies | 15 view(s)
Today,
03:39 PM
TheOAP
replied to a thread
Solve "Complex Number" equation problem: 2z^5 + z^4 - 6z^2 + z + 1 = 0
in
Intermediate/Advanced Algebra
Hi, Synthetic Division (SD) doesn't help here. I ran my program which has an "extension" to SD and get the same results as Wolfram : * No...
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2 replies | 96 view(s)
Today,
03:33 PM
Subhotosh Khan
replied to a thread
How are different bases pronounced?
in
Arithmetic
Is eleventy-eleven allowed?!!
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4 replies | 34 view(s)
Today,
03:31 PM
sarahlou84
started a thread
Working out area
in
Arithmetic
The dimension of a sleeping bag and ground mat is 2 m x 1 m. Each sleeping bag and ground mat must be 0.25 metres away from the edge of the tent. ...
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0 replies | 4 view(s)
Today,
03:30 PM
sarahlou84
started a thread
Working out scale
in
Arithmetic
You and your friends decide to camp for one night. Look at the diagram of your tent below. It is drawn on 1 cm squared paper. The scale is 1 cm :...
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0 replies | 3 view(s)
Today,
03:21 PM
j-astron
replied to a thread
Representing a view of a 3D sphere as a 2D circle?
in
Geometry and Trig
It does seem to be a problem of map projection (EDIT: which means mapping points from the surface of a 3D sphere onto a 2D surface of some shape). ...
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1 replies | 51 view(s)
Today,
02:46 PM
ka923
replied to a thread
weird conic section problem
in
Intermediate/Advanced Algebra
hi sorry for the late reply, so far we have learned about the equation of the parabola and how to sketch it, also how to rearrange the equation of...
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9 replies | 131 view(s)
Today,
02:45 PM
JeffM
replied to a thread
Throwing three different dices - probability of getting a six
in
Probability / Statistics
Modifying PKA's notation: N \text { is the event of selecting the normal die;}\\ H \text { is the event of selecting the die with three 6's;}\\...
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8 replies | 90 view(s)
Today,
01:48 PM
Dr.Peterson
replied to a thread
Calculating tension for mass on incline slope
in
Geometry and Trig
In order to give specific help, we need to know whether your equations are wrong, or you are wrong about not being able to solve them. Can you at...
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2 replies | 21 view(s)
Today,
01:36 PM
sinx
replied to a thread
derive eqn for vol of sphere using polar coordinates.
in
Calculus
yes, i think i got it now. the radius for the 'depth' of the 'cubical wedge'=rsin@; (not rsin&) i.e. the depth radius is projected from the...
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5 replies | 48 view(s)
Today,
01:35 PM
j-astron
replied to a thread
Calculating tension for mass on incline slope
in
Geometry and Trig
Hi eazyduzit, My advice for solving this problem would be 1) Set up a Cartesian coordinate system that is aligned with the inclined plane. I.e....
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2 replies | 21 view(s)
Today,
01:27 PM
pka
replied to a thread
Combining Functions
in
Intermediate/Advanced Algebra
The above is un-readable. But is quite readable. The bad news is that there is no unique answer. One answer might be...
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3 replies | 25 view(s)
Today,
01:17 PM
pka
replied to a thread
How are different bases pronounced?
in
Arithmetic
21_5 is read "two one base five" & is equal to 2\cdot 5^1+1\cdot 5^0 base ten. 15_6 is read "one five base six" & is equal to 1\cdot 6^1+5\cdot...
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4 replies | 34 view(s)
Today,
01:12 PM
Dr.Peterson
replied to a thread
How are different bases pronounced?
in
Arithmetic
The "official" rule is that other than base ten, you just read out the digits: "two one base five". If I say "twenty-one base five", I know I'll...
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4 replies | 34 view(s)
Today,
01:02 PM
HallsofIvy
replied to a thread
Equilateral triangle, perimeter and area? idk what to call this
in
Geometry and Trig
To extend Denis' hint, if you draw a line from one vertex of an equilateral triangle perpendicular to the base, that line also bisects the side,...
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3 replies | 40 view(s)
Today,
12:58 PM
calculuslove
started a thread
Solution of eq (x^2+y)^2dy=xydx
in
Differential Equations
I have tried different methods but I am neither able to reduce it to a homogenous equation nor to a linear differentiable equation. Please guide me...
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0 replies | 6 view(s)
Today,
12:48 PM
j-astron
replied to a thread
Combining Functions
in
Intermediate/Advanced Algebra
Hi Hanna88 What are you thinking with this one? What have you got so far? Show us your attempts to solve the problem, and we can tell you whether...
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3 replies | 25 view(s)
Today,
12:30 PM
j-astron
replied to a thread
How are different bases pronounced?
in
Arithmetic
Yeah, it's an interesting question, and not one that I think has a clear answer. I would probably read it as twenty-one (base 5), even though...
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4 replies | 34 view(s)
Today,
12:23 PM
Denis
replied to a thread
Equilateral triangle, perimeter and area? idk what to call this
in
Geometry and Trig
HINT: "look for a 30-60-90 triangle" :cool:
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3 replies | 40 view(s)
Today,
12:10 PM
Denis
replied to a thread
I need help with linear programming
in
Intermediate/Advanced Algebra
As worded, answer is 25 + 45 = 70 ; simply both at capacity...
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2 replies | 30 view(s)
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