Find the temperature u(x, t) in a rod of length L if the initial temperature is f(x) throughout and if the ends x 0 and x L are insulated

to be honest as much as i would love to answer this. i feel as if something's missing. just saying.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

b. a lightning bug, plug of grass, and a worm