Answer:
This is a stratified random sample because a separate random sample is selected from each class
Explanation:
Stratified random sampling is an appropriate method when the population consists of mixed characteristics and you would like to ensure that every characteristic is proportionally represented in the sample. In this example, the population is the students from Central High School and the mixed characteristics are the different classes such as Freshman students, Sophomore students, Juniors and Seniors.
After the population is divided into subgroups based on characteristics, from the overall proportion of the population, you calculate how many people should be sampled in each subgroup. Random or systematic sampling can then be used to select a sample from each subgroup.
Answer:
the value of the goods that were given up to produce the bicycle.
Explanation:
Opportunity cost is the cost of the next best option forgone when one option is chosen over other alternatives.
the opportunity cost of purchasing the bicycle is the value of other things that could have been bought instead of the bicycle
Inflation is 110
<u>Explanation:</u>
The consumer price index is the ratio of the basket prices of the current year to the basket price of the base year multipliers by 100, this helps us to determine inflation
now, cpi in second year = 
= 110
Answer: $25000
Explanation:
From the question, we are informed that Betty made a 20% profit on a residential lot she sold for $30,000. Let the cost price of the property be represented by x.
Therefore, (100% + 20%) of x = $30000. This means that 120% of x = $30000.
120% × x = $30000
1.2x = $30000
x = $30000/1.2
x = $25000
Therefore, the amount paid for the property is $25000
