What is the difference between a dollar and a half and thirty five-cents?

Question

A wire of length 11 m, is to be hung between two poles that are separated by a horizontal distance of 10 m.
The two hanging points have the same elevation above the ground.
Find Δh, the difference in elevation between each of the hanging points and the point half way between the two poles?

Answer 1

Nothing. A dollar and a half is the same as thirty five-cents (nickels). But not the same as thirty-five cents.