Identify the type of sampling described by the proposal.At a local technical school, five auto repair classes are randomly selected and all of the students from each class are interviewed.
A. convenience sample
B. simple random sample
C. cluster sample
D. stratified sample
E. systematic sample
Answer: C
Mathematics
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Evaluate the spherical coordinate integral.
A.
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B.
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Perform the indicated operation.2
- 5
A. -45
B. 45
C. -5
D. 5
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Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.Chandra has 2 liters of a 49% solution of sodium hydroxide in a container. What is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 7 liters of 59% solution?
A. 5 liters of 63% solution B. 5 liters of 66% solution C. 5 liters of 61% solution D. 5 liters of 64% solution
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Use one or more transformations to graph the function.y = -2(x - 3)2 - 5 
A. 
B. 
C. 
D. 
Mathematics