5.) it is already in order
6.)0.3, 3/9, 0.8
7.) 2/16 & 3/24
8.) 4/14 & 6/21
10 different groups can ski.
This is a combination of 5 items taken 3 at a time:
4πr2
= 4×π×42
= 64π
= 201.06192982975 inches2
The answer should be the last one
I think the answer would be c
13 + the cost of 1 brush + the cost of 1 brush = total money spent