Hey guys,

I've got a set of problems that I am unsure of if I have done the right way. The first one (exercise 35) below is a supposedly pretty simple task. For a) I have written:

P(x)=

P(0 < x < 501)= 0.80x

P(501 < x < 1001) = 0.72x

P( x > 1000) = 0.65x

Is there a way I can write this as one equation (and perhaps including limits somehow?)

Also, for a) and b), how is this different? Since there are no other elements (like fixed costs etc)

What's c) really asking for?

For exercise 44, I think I have found the correct way to read the graph, but I am not certain.

a) 3

b) -1

c) 3

d) -1

e) 1

f) 1

g) -2

h) -2

i) infinity+

j) infinity-

k) Does not exist

l) Does not exist

m) 5

n) 5

p) 5

q) 2

r) 4

s) 2

I also have a problem to grasp what the difference between

m) lim f(x) x -> 6-

n) lim f(x) x -> 6+

p) lim f(x) x -> -6

q) f(6)

If someone could help out here it would be awesome! I am not really looking for someone to do my homework, because we are going to have several tests and exams where this will be a respectable part. I hope also the fact that I am spending saturday night of my first weekend at college doing math shows some kind of dedication (I hope!).

Thanks in advance