Answer:
Distance between Alice and Amy is 117 feet.
Explanation:
As shown in the figure attached, Amy spots Alice at the corner of the party hall diagonally opposite her.
If the party hall is in a rectangle shape. Measure of the hall sides are 100 feet by 60 feet.
We know shortest distance from one corner to the other corner is a diagonal.
Therefore, shortest distance between Amy and Alice will be = length of the diagonal =
=
=
= 116.62
≈ 117 feet
Therefore, Alice and Amy are 117 feet apart.