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the ratio of PR to QS is 1:1 because they are congruent (equal)
If you draw a picture, you will see that PQRS is a parallelogram.
Answer:
a) cluster sampling
Step-by-step explanation:
In cluster sampling method, each member of a population is assigned to one and only one group.This means clusters are formed through probability method usually a simple random sampling.The participants in the clusters are the only one to be surveyed.
In this example, simple random sampling is used to identify 12 home rooms(cluster) where a group of 20 students (participants) in each room is given the survey.
Given the expression
The expression that is equivalent to the given expression is given by: