Find the second derivative of r(x)=10x-0.001x^2
1 answer:
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Answer:
B
Step-by-step explanation:
Converting it to z, we can use the formula of z-score:
z-score =
Where
x is the value we are checking for (here, x = 79)
is the mean, which is 85
is the standard deviation, which is 4 now
<em>Let's plug the information into the formula and solve for the answer:</em>
<em></em>
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<em>B is the correct answer.</em>