The formula for permutations is:
![_nP_r = \frac{n!}{(n-r)!}](https://tex.z-dn.net/?f=_nP_r%20%3D%20%5Cfrac%7Bn%21%7D%7B%28n-r%29%21%7D%20)
So the answer is D.
But this is not geometry, is it? It's combinatorics.
Answer:
Step-by-step explanation:
The rate of change of the radius dr/dt = . 75 in/min because the radius is increasing with respect to time. hence, the volume is increasing at a rate of 75π cu in/min when the radius has a length of 5 inches.
Answer:
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Step-by-step explanation:
When you round you have to check the number to the right of the number you are rounding. If the number to the right is 0-4 then you keep the number the same. 5-9 the number you are rounding goes up by one. Now the 4 before the decimal point is in the ones spot. The 5 to the right of the 4 is the tenth spot and the 6 to the right of that is in the hundredth spot. so this is where we need to round. To the right of the 6 is a 4 so the number would stay the same. Now when you round you drop all the numbers after it so the number is 3184.56
Step-by-step explanation:
you just have to use the definition of union and cross section