Surface area of a cylinder=area of 2 bases+area of around cylinder
area of bases=area of circle os 2 times pi times r^2
area of around=circunferenc of circle times height of cylnder=2 timespi timer r times height so 2pirh
so add
area of bases+area around=2pir^2+2pirh
not sure what standard form is
so he answer is
2pi(r^2)+2pi(r)(h)
Answer:
its a black screen so yeah
4/5 P + 6 is the answer. just put it in whatever order youd like
Answer: There are 140 adults and 40 children.
Step-by-step explanation:
Let 2x = Number of children
7x = Number of adults.
As there are 100 more adults than children.
That means, 
Number of children = 2 (20)=40
Number of adults = 7(20) = 140
Hence, there are 140 adults and 40 children.
You didn't include the options, so whichever one looks like x=(12.53+11.86)3.19 or something similar. You need to add the amount of gallons he bought, then multiply them by the cost per gallon, which will most likely be set equal to a variable.
