To find median, we need to find the middle number in the set. There are five numbers, so the middle number is basically third in the set. That number is \(\displaystyle 5\). 

To find median, we should arrrange the numbers in increasing order. That would be \(\displaystyle 2, 5, 7, 16, 18\). Next, since there are five numbers, the middle number is the third. That value is \(\displaystyle 7\). 

To find median, we count the numbers in the set. There are six. Since six is an even number, we go to the two middle numbers which are \(\displaystyle 6\) and \(\displaystyle 8\). We average the two numbers to get \(\displaystyle 7\). 

To find median, we count the numbers in the set. There are six. Since six is an even number, we go to the two middle numbers which are \(\displaystyle -3\) and \(\displaystyle 1\). We average the two numbers to get \(\displaystyle -1\). 

To find median, we must arrange the numbers in increasing order. The larger the negative value, the smaller it is. We get \(\displaystyle -22, -14, -9, -6, 0, 9\).Then, we count the numbers in the set. There are six. Since six is an even number, we go to the two middle numbers which are \(\displaystyle -9\) and \(\displaystyle -6\). We average the two numbers to get \(\displaystyle -7.5\). 

To find median, we must arrange the numbers in increasing order. The larger the negative value, the smaller it is. We get \(\displaystyle -98.3, -6.2, -3.5, -2.4, -2.4, 4.6, 6.8\).Then, we count the numbers in the set. There are seven. The middle number is \(\displaystyle -2.4\). 

To ensure the median is below \(\displaystyle 5\), we need to arrange so that \(\displaystyle x\) is the middle. So we have \(\displaystyle 2, 4, x, 8, 9\). The only value below \(\displaystyle 5\) is \(\displaystyle 4.5\). 

To find median, let's arrange the numebers in increasing order so that we can get a median between \(\displaystyle 0\) and \(\displaystyle 1\) inclusive. We have \(\displaystyle -5, -3, -1, x, 4, 5\). This works best since \(\displaystyle -1\) when added to a value and averaged will fall in our target interval. The equation to find the median for an even set will be \(\displaystyle \frac{-1+x}{2}=0\) or \(\displaystyle \frac{-1+x}{2}=1\). The reason for this is to find the minimum and maximum value of \(\displaystyle x\). For the first equation, we cross multiply and get \(\displaystyle -1+x=0\) or \(\displaystyle x=1\). The second equation we get \(\displaystyle -1+x=2\) or \(\displaystyle x=3\). The value that's not in this range is \(\displaystyle 4\). 

When finding median of even numbers in the set, you take the average of the two middle numbers to find median. Since \(\displaystyle 2\) is an even number and we know the average, that value is the same as the median. Answer is \(\displaystyle 7\). 

If we count the total number of cars, we get \(\displaystyle 15\). The middle number is \(\displaystyle 8\). When going in order from smallest to largest, number \(\displaystyle 8\) falls in the \(\displaystyle 20000\) category so that's the answer.