The answer is A. d-17= 22; d=39
Answer:
100000 pass codes
Step-by-step explanation:
the pass code form is: abcde
a: 10 numbers to choose
b: 10 numbers
c: 10 numbers
d: 10 numbers
e: 10 numbers
so there are 10^5 = 100000 pass codes exist
The 99% confidence interval for the true mean is given by:

where:

is the sample mean = 69.7

is the standard deviation = 2.8

is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.
Therefore, the 99% confidence interval is:
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Formula
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Circumference = πD
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Find Diameter
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10π = πD
D = 10 ← divide by π on both sides
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Find Radius
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Radius = Diameter ÷ 2
Radius = 10 ÷ 2
Radius = 5
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Answer: Radius = 5 units
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