HELP PLEASE. EDGE 2021

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Here is another math questions. i will keep asking different questions. 4^2x=6