Answer:
The 98% confidence interval estimate of the proportion of adults who use social media is (0.56, 0.6034).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
Of the 2809 people who responded to survey, 1634 stated that they currently use social media.
This means that 
98% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
The lower limit of this interval is:
The upper limit of this interval is:
The 98% confidence interval estimate of the proportion of adults who use social media is (0.56, 0.6034).
Step-by-step explanation:
Let assume that,
So,
Given,
perimeter = 200 feet
We know that,
Perimeter = 2(length + wide)
So,
So length = x + 40 = 30 + 40 = 70 feet
Answer:
The values for the given function f is defined by 
is
a) 
,
b) 
and
c) 
Step-by-step explanation:
Given that the function f is defined by
Now to find the value of f(0), f(18) and f(-18)
Now take f(0)
Put x=0 in the given function we get
Therefore
Put x=18 in the given function we get
Therefore
Put x=-18 in the given function we get
Therefore
The values for the given function f is
a) ,
b) and
c)
Let the width of table B be w, and since area of table A = area of table B, then 6 2/3 x 3 1/2 = 4 1/4 x w [this is the required equation]
20/3 x 7/2 = 17/4 w
17/4 w = 70/3
w = 70/3 / 17/4 = 70/3 x 4/17 = 280/51 = 5 25/51
