The distribution of the amount of money spent on book purchases for a semester by college students has a mean of $280 and a standard deviation of $40. if the distribution is bell-shaped and symmetric, what proportion of students will spend between $200 and $280 this semester? round your answer to four decimal places.

0.4772

Step-by-step explanation:

Given : The distribution is bell shaped , then the distribution must be normal distribution.

Mean :

Standard deviation :

The formula to calculate the z-score :-

For x = $200

For x = $280

The p-value =

Hence, the proportion of students will spend between $200 and $280 this semester = 0.4772

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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