Answer:
b. Invalid, because the sample may not be representative of the population.
Step-by-step explanation:
A sample of around 10% of the population is needed to be representative.
In this question:
We have a population of 500,000, and a sample of 10,000.
10,000/500,000 = 1/50 = 0.02 = 2% of the population, so not representative, and option b is correct.
(x-1) (x + 10)
Step-by-step explanation:
I think it's this but I'm not sure if I did it right
Answer:
A.
Step-by-step explanation:
Because they are both subtracting, both lines have to go to the left
Answer:
fish and snake are the complement of set m
Multiply the numerator and denominator by the conjugate of the denominator:
Simplify:
