Step-by-step explanation:
z-score is:
z = (x − μ) / σ
For the four students:
z = (1990 − 1548) / 319 = 1.39
z = (1280 − 1548) / 319 = -0.84
z = (2240 − 1548) / 319 = 2.17
z = (1450 − 1548) / 319 = -0.31
z-scores are considered significant if they are less than -2 or greater than 2. So the third student's score is unusual.
The answer is A.
But that is not the exact answer as 3.14 is not exactly equal to pi but that's the best we can do when theres a billion digits of pi
Answer:
y=-6/7+13
Step-by-step explanation:
The y intercept will just move 9 units up (so add 9 to 4)
Answer:
when you divide powers with the same base, you can just subtract the exponents
