Answer:
3
Step-by-step explanation:
I'm just guessing because you don't give any numbers or anything at all
Solution:
Given the mean and standard deviation;

The z-score formula is;

(a)

(b)

(c)
Answer:
$52
Step-by-step explanation:
3 books → $13
1 book → $13/3
12 books → $13/3 x 12 = $52
Answer:
$16.25
Step-by-step explanation:
4 hats cost $65
1 hat cost 65/4=16,25
oops sorry wrong question. sorry if I confused anyone :(