Find the volume of a sphere and radius is 3. please answer in terms of pi

12 pi

Step-by-step explanation:

volume of sphere = 4/3 pi r2

4/3 pi 3 x 3

12 pi unit square

Solution :

According to the question PC magazine conducted a survey and asked its readers to participate their satisfaction with the different brands of the electronic item. Around 9000 readers rated the product from scale 1 to 10.

SO we have to identify the following regarding the survey :

a. identifying the population

  -- all the readers of the PC magazine

b.  identifying the parameters of the interests

   -- the population mean that rated the digital camera

c.  identifying the sampling frame

--- all the readers

d.  identifying the sample size

  -- unknown

e.  identifying the sampling design

  -- voluntary response