Answer:
x= 13
Step-by-step explanation:
12²+5²
=169
square root of 169 =13 answer 13#
Answer:
18.0167≤x≤21.9833
Step-by-step explanation:
Given the following
sample size n = 10
standard deviation s = 3.2
Sample mean = 20
z-score at 95% = 1.96
Confidence Interval = x ± z×s/√n
Confidence Interval = 20 ± 1.96×3.2/√10
Confidence Interval = 20 ± (1.96×3.2/3.16)
Confidence Interval = 20 ± (1.96×1.0119)
Confidence Interval = 20 ± 1.9833
CI = {20-1.9833, 20+1.9833}
CI = {18.0167, 21.9833}
Hence the required confidence interval is 18.0167≤x≤21.9833
Step-by-step explanation:
Since we have given that
Amount of pay rate =$21
If she marked up by 78.7% , so it becomes

So, our amount for pay rate becomes

Now, he said he made a profit of 10%,so it becomes

So, our new pay rate becomes

This is the step through which we can get $41.28.
Answer:
$814.12
Step-by-step explanation:
1.5% of the selling price of 1,207.74 is added on to the state tax of $796. We have to find out the total sales tax of the city and state taxes combined.
1207.74 * .015 = 18.1161 (rounded to 18.12)
18.12 + 796 = 814.12