80/100*n=16
80n=1600
n=1600/80=160/8=20
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Original price: $20.00
Answer:
10.5
Step-by-step explanation:
Add It All Up, and Divide By 4
The margin of error can be calculated using the t
statistic. The formula for margin of error is given as:
<span>Margin of error = t * s / sqrt (n) ---> 1</span>
Where,
t = the t score based on the given confidence level and
degrees of freedom
n = number of samples = 21
s = standard deviation = 7.1
Degrees of freedom = n – 1 = 21 – 1 = 20
Based on the standard probability tables for t, the t
score is:
t = 0.860
Substituting into equation 1:
margin of error = 0.860 * 7.1 / sqrt (21)
margin of error = 1.33
The range is:
range = 30.1 ± 1.33
range = 28.77, 31.43
Therefore the commute time to work is between 28.77 minutes
and 31.43 minutes.
Answer:
A: (10k+m)(10k−m)
Step-by-step explanation:
14 fourths, because since 4 fourths make up 1, we would multiply 4 times 4, which gives us 16, and then add the extra 1/4. =)