Answer:
The Z score of the person is -3.09.
Step-by-step explanation:
The standard normal deviate (Z) for a normal distribution is given by

where,
X = the value of observation
is mean of the observations and
σ = standard deviation of the score
Applying values we get

(72/80)x90=81
Divide seventy-two by eight and multiply it Ninety.
Would this work? Hope it helps
Answer:
Adding 1/4 each time
Step-by-step explanation:
1/4+1/4=1/2
1/2+1/4=3/4
3/4+1/4=1