Answer:
Surface area of cylinder= 211.5π
Step-by-step explanation:
Given,
Height of cylinder = 19cm
Diameter of cylinder = 9cm
i.e Radius of cylinder = diameter/2 = 9/2 = 4.5cm
Surface area of cylinder = 2πrh + 2πr²
Plug corresponding values of r and h in surface are formula.
Surface area of cylinder = 2πrh + 2πr² = 2π*4.5*19 + 2π*4.5²
Surface area of cylinder = 171π+40.5π = 211.5π
Hence we get surface area of cylinder= 211.5π
Answer:
2.33 units
Step-by-step explanation:

13,986
Step-by-step explanation:
Juss used a calculator, the rest guess
Answer:
62. 84%
Step-by-step explanation:
total revenue of a company from music sales and licensing in 1999 = $14.8 billion
Foretasted total revenue of a company from music sales and licensing in 2014 = $5.5 billion
decrease in revenue of a company from music sales and licensing in 2014 from 1999 = $14.8 billion - $5.5 billion = 9.3 billion
Therefore percentage decrease in music revenue =( difference in revenue from 1999 to 2014/ revenue in 1999 ) * 100

percent decrease in music revenue is 62. 84%.