The mean of a set of credit scores is o = 690 and Sigma = 14. Which statement must be true?
A. z690 is within 1 standard deviation of the mean.
B. z690 is between 1 and 2 standard deviations of the mean.
C. z690 is between 2 and 3 standard deviations of the mean.
D. z690 is more than 3 standard deviations of the mean.

C. Z690 is between 2 and 3 standard deviations of the mean

Step-by-step explanation:

A z-score tells us how many standard deviations away from the mean a value is.

Given that the mean of the credit score is

μ = 690

And the standard deviation is

σ = 14

Then, the z score is calculated using

z = (x - μ) / σ

Since it is not away from the mean, it is within 1 standard deviation above or below the mean.

Then, since 1 standard deviation is between -2 and -3

Then, the Z690 is between 2 and 3 standard deviations of the mean

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.