Question

I have the answer can someone just see if I'm right!!!
Let f(x) be the elevation in feet of the Missippi river x miles from the source. What are the units of f ' (x)

Answer 1

what answer did you get?

Answer 2

I got miles/foot^2

Answer 3

f(x) is the elevation in ft
x is the distance in miles

so you have change in ft over change in miles

Answer 4

so then it is feet/miles

Answer 5

now you could argue that because 5280 ft = 1 mile, you can express f(x) in miles to get change in miles over change in miles...which would make the units cancel out

Answer 6

is the answer I choose before correct feet/miles

Answer 7

is there a "no units" option? because that's what I would go with

Answer 8

no there isn't

Answer 9

there is just miles option

Answer 10

they are looking for ft/mile

Answer 11

well I guess ft/mile could work, but you could easily say "no units" as well

Answer 12

ok thanks

Answer 13

yw