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masha68 [24]
3 years ago
9

If the z-value for a given value x of the random variable X is z = 1.96, and the distribution of X is normally distributed with

a mean of 60 and a standard deviation of 6, to what x-value does this z-value correspond?
a. 71.76
b. 67.96
c. 61.96
d. 48.24
Mathematics
1 answer:
svetoff [14.1K]3 years ago
7 0

Answer:

<h2><u><em>d</em></u></h2>

Step-by-step explanation:

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A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the
nydimaria [60]

Answer:

Step-by-step explanation:

As you can see, this is a quadratic equation and if you were to graph this you would see that it is a parabola that opens down because of the negative leading coefficient (-34). The maximum profit would be at the vertex, of the graph. Therefore, we need to find the value of "y" when "x" is the line of symmetry. We find this by  x=-b/(2a) where a = -34 and b = 1542:

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We put this value of "x" into the original formula to find out the value of "y":

y=-34x^2+1542x-10037

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y= -17483.5588235 + 34967.1176471 -10037

y=7446.5588236

Therefore, the maximum profit would be $7446.56.

Hope this helps!

PLS MARK BRAINLIEST THIS TOOK A LOT OF TIME

7 0
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