Answer:
|x-8| = 7
Step-by-step explanation:
The following equation would make x=15 when solved.
|x-8| = 7
This is because if we substitute 15 for x we would have to subtract 8 from 15 which would give us 7 and the absolute value of 7 is 7 which would ultimately make the equation true.
If there are 5,280ft in a mile and 3 feet in a single yard then its 5280÷3=1,760yards in a mile. Likewise if there are 5,280 feet in a mile, then it would be 5,280×12inches(because there are 12 inches in a foot). 5,280×12=63,360inches in a mile.
1mile=5,280feet
1mile=1,760yards
1mile=63,360inches
Answer:
You must test a sample size of at least 514 Americans.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence interval 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
is the margin of error.
95% confidence interval
So 
, z is the value of Z that has a pvalue of 
, so 
.
We have that:
So
You must test a sample size of at least 514 Americans.
Answer:
The answer is d)
Step-by-step explanation:
Each hour is worth $7.5, it will take 60 hours
