Answer:
i think its -14
Step-by-step explanation:
it says the temperature decreases by 6 for every 1 kilometer
if you subtract 30 from 16 (because 6 time 5 is 30)
you get -14
im not 100% sure tho
Answer:
46
Step-by-step explanation:
Circumference of Circle A is is 42pi.
It is the same for all circles. To find the circumference, one must use the constant equation of 2pir. This equation stays the same, no matter what.
Answer:

Option d.
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
.
The margin of error is:

79 percent of adults age 18 years and older in the United States use the Internet.
This means that 
98% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Which of the following should be used to find the sample size (n) needed?
We have to find n for which 
So the equation is:


Option d.