It's a computation. It would be 8!/3!(8-3)! If my memory serves me correctly.
Answer: 
Step-by-step explanation:
You need to use the following formula:

Given the points A(6,3) and B(8,1), you can identify that:

Now, you can substitute these values into the formula
.
Therefore, you get this result:


Volume is just length x width x height. 5 x 6 x 7 is 210. 210cm
5x^4
Step-by-step explanation:
simply we take 5x^4 bec. it can be divided by 40 and 135