The volume of the original cylinder is
... V = π·r²·h
For r=1 and h=1, this is
... V = π·1²·1 = π
For the new cylinder, the volume is 1.089 times that amount.
... V = 1.089π = π·1.1²·(1-k)
... 1.089/1.21 = 1-k
... k = 1 - 1.089/1.21 = 1 - 0.9 = 0.1 = 10%
The appropriate choice is (B) 10.
Answer:
Kevin can afford to have 15 guests at his party.
Step-by-step explanation:
You know that Kevin's party costs $52, so you can subtract 52 from 97, which is 45. So, he can spend $45 dollars on guests. $45 divided by 3, the amount it takes for each guest, to get 15.
