Recent content by max0005

I get this..

Homework Statement Dear All, I currently have a set of data which, when plotted on a scatter diagram, proves an inverse proportionality between two sets of data. (Please see attachment.) I now need to linearize the graph as to estimate the half-life of the foam. Homework Equations...

I'd have another question, always on the same type of problem. A girl approaches a tower 75m high at 5km/hr. At what rate is the distance from the top of the tower changing when she is 50m from the foot of the tower? What is given is: \frac{dX}{dt} = 5km/hr ) Where X is the...

Ok, getting that too! :D Thank you very much! :D

I get about 234, while the book gives 37.5 ..

So L(5) is 12.5. Therefore I should now substitute values in the equation for \frac{dV}{dt}, but doing so returns a wrong answer according to my textbook...

Dear Mark44, thanks for your answer. I'm sorry, I always mistake terminology and syntax. What I meant is that the length of the sides at time T is 10 (original size) + 0.5 (expansion/hour) * T (number of hours): 10+0.5(T)... Is this correct?

Homework Statement Dear All, I am having problems understanding how to deal with related rates. The problem is the following: A solid 400gm metal cube of size length 10cm expands uniformly when heated. If the length of its side expand at 0.5cm(hr), find the rate at which, after 5...

Homework Statement Dear All, Suppose I had to values: A (±a) and B (±b) where A not equal to a and B not equal to b. I have to find the product of A and B taking into consideration uncertainties. Homework Equations A (±a) * B (±b) = C (±c) where c = (a/A+b/B) The Attempt at a...

Ok, got it, thanks! :D

Then I'd get \frac{1}{h}*\frac{-2h}{x^2+xh+2x+h+1} But I don't understand how to continue..

Homework Statement Find the first derivate of \frac{2}{x+1}. Formula: \frac{f(x+h)-f(x)}{h} Homework Equations Formula: \frac{f(x+h)-f(x)}{h} The Attempt at a Solution \frac{\frac{2}{x+h+1}-\frac{2}{x+1}}{h} h(\frac{2}{x+h+1}-\frac{2}{x+1}) h(\frac{2(x+1)-2(x+h+1)}{(x+1)(x+h+1)}...

Ok, got it! Thanks! :D

Hi Mark44, thanks for your answer! I think I understood what you mean, but still have a question. By putting angle BCD as 74° it means that the sun is (theoretically speaking) orbiting around that point. Being that point also the length of the shadow, it would that when the angle is 62°...

Less than 90 (DBC is right)... However, I need exact answers, not estimates. :(