Answer:
0.00621
Step-by-step explanation:
We solve the above question using the
Z score formula. This is given as:
z = (x-μ)/σ/√n
where
x is the raw score = 12.20 or earlier
This means x ≤ 12.20
μ is the population mean = 13.20
σ is the population standard deviation = 2
n is the random number of samples = 25
z = 12.2 - 13.2/2/√25
z = -1/2/5
z = -1/0.4
z = -2.5
Probability value from Z-Table:
P(x≤ 12.2) = 0.0062097
Approximately = 0.00621
Therefore, the probability of randomly selecting a sample of 25 children who stood on their own by the average age of 12.2 months or earlier is 0.00621
Answer:
40
Step-by-step explanation:
The formula for a rhombuses area is (pq)/2. If we fill in the values, we get 80/2 = 40
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Answer:
3 8
18 48
22.5 60
27 72
Step-by-step explanation:
3:8 ratio
18/3=6
8*6=48
Equation of line: Y= mX + c
where m is slope and c is y intercept.
rewrite equation to be,
-x-7y=-56
-7y=x-56
7y= -x +56
y = -1/7 x +8
slope = -1/7
y intercept = 8