Hi there! Hopefully This helps!
<h2><em>Answer: The mean number of this data set is 43. The mean represents the average number of minutes Julio practiced on his trumpet for 6 days.</em></h2>
Explanation:
<u><em>To find the "mean" you need to count how many numbers are in the data set. Then add up all the numbers in the data set. </em></u>
In this case you have six numbers in the data set, and all the numbers added up together(21+30+39+43+58+67) are 258.
<u><em>After adding up all the numbers, divide them by how many numbers are in the data set.</em></u>
258/6 = 43.
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Ok, first you need to combine the like terms, or you can use a different method. It should get easy from there
Consider c as the cost of the widget so that our given equation is
c = 0.1w^2 + 20w
Take the derivate of the equation.
d/dt (c = 0.1w^2 + 20w)
dc/dt = 0.2w + 20
Given dc/dt = $16000 per month, the number of widgets would contain:
16000 = 0.2w + 20
-0.2w = 20 - 16000
-0.2w = -15980
w = 79900 widgets
10x8=80 dollars that day
80+30=$110
Hope this helps!! Have a good day
