Answer:
0.4987, so 49.9%
Step-by-step explanation:
We will need to find 2 z-scores for this situation. We are asked to find the probability of scores between 72% and 87%.
We are given:
µ = 72%
σ = 5%
x = 72% - 87%
So we need:
P(72 < x < 87)
Find the z-score for 72:
z = (72 - 72)/5 = 0
Find the z-score for 87:
z = (87 - 72)/5 = 3
So we have
P(72 < x < 87) = P(0 < z < 3) = P(z < 3) - P(z < 0)
P(z < 3) = 0.9987
P(z < 0) = 0.500
So we have
0.9987 - 0.500 = 0.4987
Answer:
the answer of this problem is
a=1 and b=-8
Answer:
For 30, it is x = 3.6. And for the 32, it is x = 6.25
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
Im not completely sure
Answer:
120°
Step-by-step explanation:
The angle just below 'x' is 40° (alternate angles/parallel lines)
40 + x + 20 = 180 ( straight line)
x = 120°
