It looks right, but I could be wrong
Answer:
B) 25x + 50, where x is the number of hours .
Solution:
Let x be the number of hours editor takes to edit 3 essays.
The editor is paid $25 an hour .
Amount earned in x hours = 25x
Additional bonus given after edition of three essays = $50.
Total amount earned by the editor = 25x+50
The right option is :
B) 25x + 50, where x is the number of hours
The answer to 1 is (E) All of the above. This is because a negative cannot be under a square root and it comes out as an i.
The answer to 2 is (B) a is real and b is imaginary. This is because anything that has an "i" attached to it is considered imaginary.
Answer:
The expected participation rate is 0.637.
The standard error is 0.04397
Step-by-step explanation:
For each working age people asked, there are only two possible outcomes. Either they are in the labor force, or they are not. This means that we can solve this problem using binomial distribution probability concepts.
Binomial probability:
Expected value for the participation rate: The expected value is the probability of a success. In this problem, a success is a working age people being in the labor force. 63.7% of them are. So
. This means that the expected participation rate is 0.637.
Standard error for the participation rate:
The standard error is given by the following formula:
.
In this problem, 120 people are asked, so 
.
So the standard error is 0.04397