mandy9386
18.12.2019 •
Mathematics
Mark has a string that is six feet long. if he cuts it in half and then cuts each half in half, how long will each piece be?
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Ответ:
Ответ:
if you cut 6 in half you get 3 feet, like 6-3 or 6 divided by 2. so now you have 3 feet
if you want to cut 3 in half you end up with 1.5 because half of 3 is 1.5 and 1.5+1.5 is 3.
Ответ:
Cutoff for a failing score is 49 and 2.28% students failed.
Step-by-step explanation:
We have been given that scores on a psychology exam were normally distributed with a mean of 57 and a standard deviation of 4.
2 standard deviation below mean would be,
Therefore,Cutoff far a failing score is 49.
Now let us find out the z-score for our given values,
Now let us look up the probability from normal distribution table.
Therefore, percentage of students failed is 2.28%.