Answer:
3i
Step-by-step explanation:
3i x 3i = -9
-3i x -3i = -9
Therefore the square root of -9 is 3i or -3i
Answer:
58 degrees
Step-by-step explanation:
subtract 122 from 180
Answer:
C
Step-by-step explanation:
When the correlation between two variables is r-0, this means that there is no form of linear relationship between the variables although there may still be some other form of non-linear relationship between them
Answer: 
Step-by-step explanation:
The period is
.
Answer: 0.875
Step-by-step explanation: