Answer:
2
Step-by-step explanation:
7*4-3*8+2^2-6
7*4-3*8+4-6
28-3*8+4-6
28-24+4-6
4+4-6
8-6
2
4 just count how many are there that are between 19-21
Since 90 is the mean, the z-score of the mean is always 0.
The answer has to be A) r(n) = 15n +55, as when n=0, r(n)=55 so the equation must end with +55.
Im not sure which 1 unless its all of them 0-0
