Answer:
35 sandwiches to sell
Step-by-step explanation:
29+20=49
49-14=35
440/55 = 8 hours
It will take him 8 hours
This is the answer. I’m sorry for my messy handwriting
Answer:
The 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%
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:

90% 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 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%
Answer:
−8d+8f+5.436564
Step-by-step explanation: