Answer:
The way a proportion is set is as follows;

The Distance from Rio de Janeiro and San Jose Costa Rica is then found as 800 miles
Step-by-step explanation:
The dimension of the distance between Rio de Janeiro and San Jose Costa Rica = 4 inches
The map scale = 1 inch to 200 miles
To figure out how many miles it is or the actual distance from Rio de Janeiro and San Jose Costa Rica, we have;

Therefore, we have;
(4 inches × 200 miles)/(1 inche) = Distance from Rio de Janeiro and San Jose Costa Rica
Which gives;
Distance from Rio de Janeiro and San Jose Costa Rica = 800 miles.
Answer:
$3796
Step-by-step explanation:
Cost of water bill = $73
Number of residents of the local apartment complex = 52
Water bill for all 52 residents = $73×52
= $3796
Answer:
Last option

Step-by-step explanation:

If we extract a sample of size n from a normal population and we want to estimate the population mean then the confidence interval for the mean will be:

Where
Where
is an estimator for the mean μ.
n is the sample size and s is its standard deviation.
is the level of significance
= 1-Confidence Level

Then 
Then the 99% confidence interval for the population mean is

Answer:
no identity will escape! I know where you live