<u>Answer:</u>
<u>Step-by-step explanation:</u>
<u>We know that:</u>
<u>Work:</u>
- 21 x 2/3 = x
- => 7 x 3 x 2/3 = x
- => 7 x 2 = x
- => 14 = x
Hence, <u>the value of x is 14.</u>
Hoped this helped.
Just cross multiply to find 18% of 430
18/100 = x/430
430 X 18 = 7740
7740 = 100x
7740/100 = 77.4
so Melcher took about 77 photos.
Answer:
3,600
Step-by-step explanation:
Answer:
b.
821.9 cube meters
Step-by-step explanation:
Answer:
The 99% confidence interval for the proportion of all American adults who blame Barack Obama a great deal or a moderate amount for U.S. economic problems is (0.4894, 0.5706)..
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
.
For this problem, we have that:

99% 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 99% confidence interval for the proportion of all American adults who blame Barack Obama a great deal or a moderate amount for U.S. economic problems is (0.4894, 0.5706)..