Given:
The function is:

To find:
The all the real and non-real roots of the given function.
Solution:
We have,

For roots,
,


Taking square root on both sides, we get


![[\because \sqrt{-1}=i]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Csqrt%7B-1%7D%3Di%5D)
The roots of the given function are -7i and 7i.
Therefore, the correct option is B.
Answer:
z score Perry 
z score Alice 
Alice had better year in comparison with Perry.
Step-by-step explanation:
Consider the provided information.
One year Perry had the lowest ERA of any male pitcher at his school, with an ERA of 3.02. For the males, the mean ERA was 4.206 and the standard deviation was 0.846.
To find z score use the formula.

Here μ=4.206 and σ=0.846



Alice had the lowest ERA of any female pitcher at the school with an ERA of 3.16. For the females, the mean ERA was 4.519 and the standard deviation was 0.789.
Find the z score
where μ=4.519 and σ=0.789



The Perry had an ERA with a z-score is –1.402. The Alice had an ERA with a z-score is –1.722.
It is clear that the z-score value for Perry is greater than the z-score value for Alice. This indicates that Alice had better year in comparison with Perry.
Answer:
im black
Step-by-step explanation:
Answer:
the number will have the three decimal places is 19.3
Step-by-step explanation:
The computation of the number will have three decimal places is as follows
If we go through the options
We multiplied the larget number given in the options i.e. 19.3
So,
= 84.12 × 19.3
= 1,623.516
This represent that it contains the three decimal places
Therefore the number will have the three decimal places is 19.3
Hence, the same is to be considered