Given: A college-entrance exam is designed so that scores are normally distributed with a mean $(\mu)$ = 500 and a standard deviation $(\sigma)$ = 100.

A z-score measures how many standard deviations a given measurement deviates from the mean.

Let Y be a random variable that denotes the scores in the exam.

Formula for z-score = $\dfrac{Y-\mu}{\sigma}$

Z-score = $\dfrac{625-500}{100}$

⇒ Z-score = $\dfrac{125}{100}$

⇒Z-score =1.25

Therefore , the required z-score = 1.25

6 0

3 years ago

An angle measures 54° less than the measure of a supplementary angle. What is the measure of each angle?

Katen [24]

X+x+54=180
2x+54=180
2x=126
x=63
63+54=117
one angle is 63, the other is 117

8 0

3 years ago

PLEASE HELP, TIMED

vladimir1956 [14]

Answer:

your answer is c hope this helps let me know if im wrong or nah

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers