Maths 3 unit question (1 Viewer)

[ataratar]

Hey peeps, could someone pretty please help me with this one question on Rates of Change?
A square pyramid has height twice its side length s. I proved that V=(2/3)s^3 and that A = (squareroot17 + 1)s^2. Hence find the rate at which V and A are decreasing when the side length is 4 metres if the side length is shrinking at 3mm/s.

I got my formula as dV/dt = ds/dt (times) dV/ds but I never get the answer right - i think it might have something to do with the metres/mm thing. The answer is 0.096m^3/s and (3/125)(root17 +1)m^2/s.

 

[ataratar]

bump

 

[omgiloverice]

I haven't done french in a long time...

 

[braintic]

I haven't done french in a long time...

Just wondering what egal means in French. In German in means something like 'there is no difference', or often 'I don't care'. "Es ist mir egal" means 'its all the same to me' or 'I don't care - it makes no difference to me' or 'whatever!'.

 

[omgiloverice]

well its actually égal but latex discriminates against diacritic letters, it means equal as in. Deux fois sept egal quatorze . Two times three equals fourteen. I think... op you need to confirm me

 

[ataratar]

thankyou so much everyone!! ^ yep it means equal