Ben's General Store is selling yarn for $.04 a foot. How many feet can you buy for $0.52?

Question

5335 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-03-16T05:12:03

#13# feet

Let's make the amount of feet a variable, #x#.
So we have a function #f(x)=0.04x# as yarn is #$0.04# a foot.

Now they want you to spend #$0.52# on yarn, so #f(x)=0.52#

#\thereforef(x)=0.04x=0.52#
#0.52=0.04x#
#x=0.52/0.04=13#

#A: 13# feet.