Problem
Clarice drove the same distance on each day for 4 days. Then on the 5th day she drove 48 miles more for a total of 828 miles. How many miles did she drive on each of the first 4 days?
Result
Clarice drove 195 miles the first 4 days.
Solution
We have to find out how many miles in total she drove the first 4 days. To find this, we have to do some subtraction.
828 - 48 = 780
780 = miles driven the first 4 days
Next, we have to find out how miles she drove each day. To do this, we'll use some division.
780 ÷ 4 = 195
Hope this helped!
Answer: (11.95, 14.11)
Explanation:
Let x be a random variable that represent the number of years of education.
Given: Sample size : n= 26
Sample mean : 
Sample standard deviation : s = 3.22
Significance level : 
Degree of freedom: df = n-1 = 25
Critical t-value for 
and df = 25 will be
90% confidence interval for mean:
A 90% confidence interval for the mean number of years of education = (11.95, 14.11)
The new number, 200, is 400 less than the original number. What is the approximate percent change?
Answer:
Using the cost-benefit analysis table to answer the question: should Mis. Baxter allow her students to take an open-book test the best option to fill the blank pace is: Mrs. Baxter may have to reteach the material.
Explanation:
First of all, let's analyze the context and the answers.
In this case, let's consider the first option. It doesn't matter if the students obtain better results if she instead applied a closed-book test. Increasing the notes the students would obtain wouldn't mean they learned the correct answer. But that they know how to find information. So it is the most logical considering the cost-benefit analysis.
The second option says that Mrs. Baxter wouldn't need to proctor the exam. But just because it is an open book test doesn't mean students won't feel insecure about their answers and won't copy from classmates, so it's wrong.
Parents may be happier with grades. This could be a good choice but may is such an ambiguous answer that doesn't say anything. It is a tricky answer we have a 50% chance they would be happier with nice grades, but if asked her the reason they wouldn't be happy. So, it's wrong because, in the end, she didn't test their knowledge.
Fourth option Parents will encourage children to study. They could provide them reinforcement for good performance but not encourage them. They would encourage them if they performed badly. Also if they knew how they obtained it, they would definitely know they were not tested and would have a reason to be rewarded. So it is also wrong.
