The answer is c, because you have the multiply the sides
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
16 because one eighth is 2 and if u times 2 by 8 because it’s one eighth then u have 16
B and c, anything with an x^2 term is a quadratic.
(1.75 + 2 x 0.25 + 5 x 0.05) x 24= 17