(r-s)/r=d would be the rule you use to find the discount when r= regular price and s equals sale price and d= discount
Answer:
Simple random sampling
Step-by-step explanation:
Simple random sampling is a subdivision of a sample chosen from a population. Individuals are randomly chosen by chance and each individual possess the same characteristics as every other person in the population. It is a a surveying technique that is unbiased.
The idea of this sampling method is that every object has an equal chance of being chosen.
If the researcher evaluates 200 students out of the population and make sure the sample reflects the population, the sampling method used is simple random sampling.
Answer: 150,000 = (n - 150)(n + 50)
33,600 = (2w - 40) (w)
<u>Step-by-step explanation:</u>
Let n represent the "number".
then width = n + 50
and length = (n + 50) - 200 --> n - 150
Area = Length x width
150,000 = (n - 150)(n + 50)
************************************************************
Let w represent the width
then width = w
and length = 2w - 40
Area = length x width
33,600 = (2w - 40)(w)
2/5=4/10 so 9/10-4/10=5/10 which is the same as 1/2
