Homework Statement
A high jumper knows from experience that she can clear a height of at least 1.78m once in 5 attempts. She also knows that she can clear a height of at least 1.65m on 7 out of 10 attempts.
Find to 3 dp the mean and standard deviation of the heights the jumper can reach...
Homework Statement
An experiment consistion of tossing three fair coins is performed repeatedly and "success" is when all three show a head.
What is the probability that the success is on the third performance of the experiment?
Homework Equations
Geometric distribution equation
p(x) =...
We did the basics of solving differential equations in Maths this week, well, it was actually just finding other approximate values of y for an equation given the derivative and a pair of co-ordinates on it.
Are these for equations that cannot be subject to intergration?
Also, what can...
Homework Statement
Calculate the veolcity of a proton of energy 0.12 keV
proton mass = 1.7 x 10^-27
Homework Equations
The Attempt at a Solution
I thought...
0.12 keV = 120 eV
120/1.60 x 10^-19 = 7.5 x 10^20 J
E = 0.5mv^2
sqrt(2E/m) = v
but I'm getting something to x 10^23 so its...
I've been looking at some practise exams for the University I would like to apply to, I have to sit the exam on 4th November.
We have never done finding the roots of a cubic equation before and I cannot figure it out from looking on the internet, the formulas are all horrible to understand...
Derivative of a sum of functions
What would you interperate this as?
It is one of the subsections of Differentiation from the syllabus of a University entrance Exam in November but I cannot think what it is refering to.
Differentiation: Derivative of xa, including for fractional...
Struggling to put a number through this as I keep getting my original number as the encrypted number too.
A = 11
p = 3 q = 5
n = pq = 15
z = (p-1)(q-1) = 2*4 = 8
k = co-prime of z = 7
So,
A=11
n=15
z=8 (Public key)
k=7(Public key)
kj = 1 (mod z)
7j = 1 (mod 8)
for which I am getting j =...
I am doing a qualification which requires me to chooses a subject for which I will research & produce a presentation & a 5000 word essay in December.
As I plan to study maths at Degree Level I have decided to do a maths based project.
My two basic ideas are....
How does Maths keep our...
I was talking to my physics teacher the other day & he was saying about measuring the force exerted by an object on a surface if it is dropped onto it. The example we were using was dropping ball bearings onto a table (we are currently studying momentum)
If I have got the above correct, what...
After reading an article a few weeks ago about a man who had made a bicycle with a triangular & pentagonal wheel & started doing some reading on the shapes.
Made a model of it but would like to try & make a full size one as we realised that it needs some parts that I couldnt make out of...