Answer:
<u>John spends $ 37.98</u>
Step-by-step explanation:
1. John has a bill of $ 32.57
2. He leaves a tip of 18% on the amount before the coupon or tax is applied, in consequence: 32.57 + 18% (32.57) = 32.57 + 5.86 = 38.43
3. He uses a 10% off coupon on the cost of the meal, therefore:
38.43 - 10% (32.57) = 38.43 - 3.26 = 35.17
4. The tax is 8%, then:
35.17 + 8% (35.17) = 35.17 + 2.81 = 37.98
<u>John spends $ 37.98</u>
Answer:
15
Step-by-step explanation:
since there is 7 teams and 12 can be the minimum we can do 7 x 12=84
this means that 3 people could possibly be on one single team.
the maximum number is 12+3=15
Answer:
The 95% CI for the difference of means is:

Step-by-step explanation:
<em>The question is incomplete:</em>
<em>"Find a 95% confidence interval on the difference of the towels mean absorbency produced by the two processes. Assumed that the standard deviations are estimated from the data. Round to two decimals places."</em>
Process 1:
- Sample size: 10
- Mean: 200
- S.D.: 15
Process 2:
- Sample size: 4
- Mean: 300
- S.D.: 50
The difference of the sample means is:

The standard deviation can be estimated as:

The degrees of freedom are:

The t-value for a 95% confidence interval and 12 degrees of freedom is t=±2.179.
Then, the confidence interval can be written as:

Answer:
2,5
Step-by-step explanation:
2 to the right and 5 up