Recent content by jpc90

1.5dy/dt + 2.5dx/dt= 2dr/dt 1.5(0) +2.5dx/dt= 2(-400) 2.5(dx/dt)=-800 dx/dt= -800/2.5 = -320 ?

ok, so the distance is; 2.5^2= 1.5^2 + D^2 d=2

Its a triangle, and i got the distance as 2.915? If that's right, I still don't know what to do from there

Q) a plane is flying horizontally at an altitude of 1.5 miles and a speed of 400 mph. it is on a linear path that will take it directly over a radar station. find the rate at which the distance from the plane to the radar station is changing when the plane is exactly 2.5 miles from the station...

ok thanks guys

I thought since e^5x is in the denominator that it is equal to e^-5x

I did something like, 1/1+(e^5x)^2 and then 5e^-5x/1+(e^10x) I don't think that is right though, I'm pretty confused

How do you differentiate f(x)=arctan(e^5x)