Answer: 143
Step-by-step explanation:
Thanks for the free points
Cylinder Volume = PI * radius ^2 * height
52 = PI * radius ^2 * 4
radius ^2 = 52 / (PI * 4)
radius ^2 = 52 / 12.5663706144
radius ^ 2 = 4.1380285204
radius = 2.0342144726
OR a good approximation of the radius is 2 inches
The answer is C (working shown)
To get the answer we can use proportion.
30 ------------- 100%
12 --------------x
crossmultiply now
30x=12*100%
30x=1200% /:30 (divide both sides by 30)
x=40% - its the percentage of cars which finished the race.
100%-40%=60% - its the answer
25 % = 18
50% = 36
75 % = 54
100 % = 72
25% x 72 = 18 therefore n = 72
125% x 72 = 90
Therefore 125% of n is 90