Answer:
9.72
Step-by-step explanation:
The number of possible combinations is given by
... C(18, 3) = 18!/(3!(18-3)!) = 18·17·16/(3·2·1) = 816 . . . . possible combinations
_____
There are 18 ways to choose the first one; 17 ways to choose the second one, and 16 ways to choose the 3rd one. The same 3 students can be chosen in any of 3! = 6 different orders, so the product 18·17·16 must be divided by 6 to get the number of possible combinations in which order doesn't matter.
35.
5/9= 0.555555556
0.55555556*63=35
2/3= 0.6666666667
0.666666667*63= 42
63-35=28
42-28=14
She has 35 unplanted flowers and must plant 14 more in order to have filled 2/3 of her flower bed.
Answer:
V = 137.2
Step-by-step explanation:
We are given the volume equation. Simply plug in your <em>r</em> into the equation and calculate and you should get 137.189 as your answer.
10 & 12
x = 1st consecutive even number
x + 2 = 2nd consecutive even number
x + x + 2 = 22
2x + 2 = 22
2x = 20
x = 10
x + 2 = 12
10 and 12 are the two consecutive even numbers