Answer:
x is 122
Step-by-step explanation:
Answer: The percentile is 89
Step-by-step explanation:
This question can be solved using concept for t tables
In a normal distribution the curve. 
The relationship between z score, mean and standard deviation is given by

So the z value according to this is given by the formula

From the z table we can infer that p value for z=+1.217 is 88.82
So 1750 is 89th percentile
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Hey there! I'm happy to help!
If you raise a fraction to an exponent, you apply that exponent to the numerator and the denominator. This would give us
.
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X^2-8x-20 and if you rewrite that it’s (x-10) (x+2)
Answer:C. competitive firms' profits are zero.
Step-by-step explanation: Perfect competition is the highest level of competition where the number of buyers and sellers are large,all firms are price takers,no government intervention,the products are homogeneous,no firm makes extraordinary profits, there is free entry and exit for buyers and sellers etc.
IN THE LONG RUN A PERFECTLY COMPETITIVE FIRM MAKES ZERO PROFITS.