Given that € 1 = £0.72 a) How much is € 410 in £? b) What is the £ to € exchange rate?
1 answer:
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Answer:
Option B) 16
Step-by-step explanation:
We are given the following in the question:
where x is the student's original test score and y is the student's adjusted test score.
We have to find the standard deviation of the adjusted test scores of the students in the class, if the standard deviation of the original test scores of the students in the class was 20.
We know that:
- Adding a constant to each value in a data set does not change the value of the standard deviation.
- Multiplying each value in a data set by a constant also multiplies the standard deviation by that constant.
Thus, if we add 20 to each data set then, the standard deviation does not change.
But multiplying each score by 0.8, changes the standard deviation 0.8 times.
Thus, we can write:
Thus, standard deviation of adjusted score is 16.
The inverse of this function would be f(x) = .
You can find the value of any inverse function by switching the f(x) and the x value. Then you can solve for the new f(x) value. The end result will be your new inverse function. The step-by-step process is below.
f(x) = - 1 ----> Switch f(x) and x
x = - 1 ----> Add 1 to both sides
x + 1 = -----> Take the logarithm of both sides in order to get the f(x) out of the exponent
Log(x + 1) = f(x)Log3 ----> Now divide both sides by Log3
= f(x) ----> And switch the order for formatting purposes.
f(x) =
And that would be your new inverse function.