Answer:
$1452
Step-by-step explanation:

Whatt? the answer is 7z+84
there is not a single X in the equation i really dont know where you got the X
Can u show me an example so I could do this foru
Answer:
Step-by-step explanation:
Given that the random variable X is normally distributed, with
mean = 50 and standard deviation = 7.
Then we have z= 
Using this and normal table we find that
a) 
b) When z=0.02
we get

c) 90th percentile z value =1.645
90th percentile of X 