Why do you think it's important for scientists to study Earthis past climates? What information
are scientists likely to gain from investigating the
Earthis past since the data obtained by
paleoclimatolochiano io mor based-ons direct
obrates can their discoveries and models
bested on why not?

the answer is b & c i believe : )

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.