Question

first find $mu$. recall that a normal curve is bell - shaped with the highest point over the mean, $mu$.
observing the given normal curve we see that the highest point is located when $x=square$. therefore, $mu=square$.

Explanation:

Step1: Recall the property of normal curve

A normal curve is bell - shaped with the highest point over the mean \(\mu\).

Step2: Identify the \(x\) - value at the highest point

Observing the given normal curve, the highest point is located when \(x = 85\).

Step3: Determine the value of \(\mu\)

Since the highest point of the normal curve is over the mean \(\mu\), we have \(\mu=85\).

Answer:

When \(x = 85\), \(\mu = 85\)