According to a survey of college students, the use of social media varies widely according to age. Based on the survey, what is
the approximate probability that a non-social media user is an older student aged 28and up? a.31 b.46 c.65 d.69
1 answer:
Answer:
C. 65
Step-by-step explanation:
The table which shows the results of the survey are attached below.
From the table:
- Total Number of non-social media users = 71
- Number of non-social media user aged 28 and up = 46
Therefore, the probability that a non-social media user is an older student aged 28 and up
The probability that a non-social media user is an older student aged 28 and up is 65%.
<u>The correct option is C. </u>
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Answer:
The dimensions of the box that minimize the materials used is
Step-by-step explanation:
Given : An open top box is to be built with a rectangular base whose length is twice its width and with a volume of 36 ft³.
To find : The dimensions of the box that minimize the materials used ?
Solution :
An open top box is to be built with a rectangular base whose length is twice its width.
Here, width = w
Length = 2w
Height = h
The volume of the box V=36 ft³
i.e.
The equation form when top is open,
Substitute the value of h,
Derivate w.r.t 'w',
For critical point put it to zero,
Derivate the function again w.r.t 'w',
For w=3,
So, it is minimum at w=3.
Now, the dimensions of the box is
Width = 3 ft.
Length = 2(3)= 6 ft
Height =
Therefore, the dimensions of the box that minimize the materials used is