FIRST (y x 4 - y x 3 + 2y x 2 + y -1) / (y x 3 + 1)
SECOND (4y-3y+4y+y-1) / (3y+1)
THIRD (6y-1) OVER (3y+1)
Answer:
b) H0:μ=90, H1:μ≠90
Step-by-step explanation:
The corporation wants to know if the mean number of days is different from the 90 days claimed.
This means that at the null hypothesis, we test if the mean number is the claimed value of 90, and so:

The corporations wants to know if the mean number is different, and thus, at the alternate hypothesis, we test if the mean number is different from 90, that is:

This means that the correct answer is given by option b.
Answer:
You answered 201/500 of the questions correctly
Step-by-step explanation:
40.2/100=402/1000=201/500
I think it's 54 miles per hour.
Because 18*3=54
Answer: 6!
Step-by-step explanation:
9 / 1.5 = 6. To make sure, 1.5 x 6 = 9
This shows that it is scaled up 6 times larger.