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
28 x 75% = 21
Jenna ordered 21 large shirts.
Answer:

Step-by-step explanation:

Break it down step by step.

Answer:
D: √(-4)
Step-by-step explanation:
D: √(-4) is not a real number; it's an imaginary one.