Answer:
Step-by-step explanation:
20 + 6 + 30 + 6
or
10(2) + 6(2) + 15(2)
or
25 + 37
Answer:
The prizes can be given in 1320 ways.
Los premios se pueden otorgar en 1320 maneras.
Step-by-step explanation:
The order in which the swimmers are ranked is important. That is, A, B and C is a different finish than C, B and A. So we use the permutations formula to solve this question.
Permutations formula:
The number of possible permutations of x elements from a set of n elements is given by the following formula:

In this question:
3 prizes for 12 swimmers. So

The prizes can be given in 1320 ways.
Los premios se pueden otorgar en 1320 maneras.
Answer:
392*pi/3
Step-by-step explanation:
A = r²*angle *pi/ 360 = 14²*240*pi /360 divide by 10 to simplify
196 *24*pi/36 = 196*2*pi/ 3 = 392*pi/3
Answer:
54
Step-by-step explanation:
Well, divide 300 by 100, which gets you 3. So 3 feet of book shelves = 1%
So 3x18=54