Helpppp Solve for x.
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We are asked to express r in terms of A, P, and t.
We first divide both sides of the equation by t, which gives us
,
then, dividing both sides by P, we have
.
Swap the sides:
Finally subtracting 1 from both sides gives us
.
We first divide both sides of the equation by t, which gives us
then, dividing both sides by P, we have
Swap the sides:
Finally subtracting 1 from both sides gives us
The Z-score is calculated by the formula below
Step 2: Substitute the given parameters in the formula
Hence, the z-score of a person who scored 145 on the exam is -0.5