It is the second quadrant.
For this case we have the following functions:

Multiplying both functions, we obtain an expression equivalent to (mn) (x).
We have then:

Substituting values we have:

Rewriting the expression we have:
Answer:
An expression that is equivalent to (mn) (x) is:

Answer:
Jane spent the most money, while Anne spent the least.
Step-by-step explanation
Anne spent less because Jane spent 0.888 in decimal form, whereas Anne spent 0.875 in decimal form.