![muffinman97](/avatars/186.jpg)
muffinman97
28.12.2019 •
Mathematics
Asurvey of 14 middle school students showed the mean number of minutes
students talked on the cell phones in a week was 133. what
is the total number of minutes those students talked in a
week?
what was the typical amount of time a student talked in a day? explain.
another survey asked the same 14 students plus 5 other students how long
they talked for the same week. this survey said the mean number of minutes
all the students talked was 171 minutes.
what was the mean number of minutes the additional 5 other students
talked? show your solution.
what was the typical amount of time one of the 5 students talked in a day?
explain.
Solved
Show answers
More tips
- C Computers and Internet Make Money Online: Secrets and Essential Ways...
- S Style and Beauty Learn how to tie a keffiyeh on your head like a pro...
- S Style and Beauty How to braid friendship bracelets?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- C Computers and Internet How to Learn to Type Fast?...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- D Dating, Love, Relationships How to Overcome Jealousy: Tips and Tricks...
- H Health and Medicine 10 Ways to Cleanse Your Colon and Improve Your Health...
- W Work and Career How to Start Your Own Business: Tips and Recommendations...
- F Food and Cooking How to Make Delicious Cabbage Pies: The Best Recipes!...
Answers on questions: Mathematics
- M Mathematics I need helppp please...
- M Mathematics What is the fraction and percent for this...
- M Mathematics Help me with 14 and 15 Find the complement for both 14 and 15...
- M Mathematics Find the number of pens they need to sell to break even (when R = C)....
- M Mathematics What is the answer to -2t-6z-1=?...
- M Mathematics Place Value 2 Name the number places:...
- M Mathematics If a = 12 and b= 2. solve ab + ( 3a - 8b)...
- M Mathematics Please I really need help with all of it...
- M Mathematics Find the lower quartile for the data. {12, 15, 15, 14, 18, 16, 13, 17, 17, 11, 22, 16, 16, 17, 14, 14}...
- M Mathematics What is trigonometry...
Ответ:
The mean is the average, and to take the average, they had to do this:
{students' minutes added together} ÷ 14 students = 133 minutes
This is basic pre-algebra; to find the total, we do the reverse of what they did. Since they divided by 14 to get 133, we're going to do the opposite. We're going to multiply 133 by 14 to get the total:
133 × 14 = 1862 minutes
Next question. The typical amount of time a student talked in a week was 133, and you're trying to find the typical amount of time in a day. There are 7 days in a week, so divide 133 by 7 to get the typical number of minutes in a day. (I won't do this for you-- you got this!)
Alright, so 19 students talked 171 minutes on average. Let's go back again and see what the total number of minutes were.
{total} ÷ 19 = 171
{total} = 171 × 19
{total} = 3249
But, hang on. They don't just want to know the total, they want to know the "mean number of minutes the additional five other students talked". That means we have to first subtract the 14 students' total from the 19 students' total to see what the difference is:
3249 - 1862 = 1387
So the five students added 1387 minutes to the average.
Divide 1387 by 5 to see the mean number of minutes per each of the five students.
You got this! Have fun!!
Ответ: