P=2L+2W
P=2*20+2*15= 40+30=70 in
A=W*L=20*15=300 in²
18 x 20 = 360
360 / 20 = 18
So 18 is the answer
Answer:
The z value is - 2.88
Step-by-step explanation:
The formula of the z-score of a population is z = (x¯ - μ)/(σ/
)
The given in the problem is:
- μ = 121
- σ = 21
- x¯ = 112.35
- n = 49
Let us substitute all of these values in the rule above

Simplify up and down


z = - 2.883333
Round it to 2 decimal places
∴ z = - 2.88
The z value is - 2.88
Answer:
41.33
Step-by-step explanation:
you divide 124 by 3