Question

I need help with this problem. I think I am making a really simple error somewhere.

Answer 1

how can i post a photo easily

Answer 2

click on "Attach File" below blue button

Answer 3

there is none

Answer 4

below this text box, do u see row of buttons ?

Answer 5

oh

Answer 6

in the same row, as the Post button, to the left side

Answer 7

i see it

Answer 8

clock that, it pops up a window, select the photo u want to post :)

Answer 9

*click

Answer 10

calculus ?

Answer 11

yes

Answer 12

which part u need help wid, a or b

Answer 13

a

Answer 14

for a,

i) it asks to find average rate of change of C(x) , as x changes from 100 to 102

Answer 15

i have the derivative to be .30x+10.

Answer 16

we dont need to find derivative for a :)

a is pretty easy one

Answer 17

average rate of change of C(x) from x=100 to x=102 : \(\frac{C(102) - C(100)}{102-100}\)

Answer 18

or f'(102) right?

Answer 19

no,

Answer 20

f'(102) means instantaneous rate of change at x=102

Answer 21

oh makes sense. i knew i did something stupid.

Answer 22

good :) you're awesome :)

Answer 23

i try. your not so bad yourself.

Answer 24

thanks for your help!

Answer 25

hmm np !