15 apple it's all run in a race a gold medal is to be giving to the winner, it's silver medal is to be giving to the 2nd place finisher, and the browns meadow is to be given to the 3rd finisher assume that there is no ties. in how many possible way can 3 maidele be distributed?

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?

Find the interior angle of a regular polygon which has 6 sides

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected