Given:
μ = 47, population mean
σ = 3.2, population standard deviation
When the random variable is x = 42, the -score is
z = (42 - 47)/3.2 = -1.5625
From normal tables, the area to the left of is
0.0591 = 5.91%
When x = 50,
z = (50 - 47)/3.2 = 0.9375
The area to the left of z is
0.8257 = 82.57%
Therefore the area between x= 42 and x=50 is
82.57 - 5.91 = 76.66%
Answer: 3)
The correct answer is 76.7%
Option D is the correct answer.
When making a scale model, you need to ensure that both values are in proportion, or work with the same constant.
In the case of Option D, the scale model is '2 feet : 1 inch'. Since multiplying 11 by 2 is 22 and 12.5 by 2 is 25, you know for sure that these numbers are in proportion
-T.B.
The line is y=-3
if the line is parallel to the x axis, the slope is 0. No matter what x is, the y value is always -3
Answer:
264 miles
Step-by-step explanation:
Using the relation ...
distance = speed · time
we can rearrange to get ...
speed = distance/time
We can choose to let d represent the distance we want to find. Then Jina's speed going to the mountains is d/6. Her speed coming home is then d/6+22. It takes Jina 4 hours at that speed to cover the same distance, so we have ...
d = 4(d/6 +22)
d = 2/3d +88 . . . . eliminate parentheses
1/3d = 88 . . . . . . . subtract 2/3d
d = 264 . . . . . . . . . multiply by 3
Jina lives 264 miles from the mountains.
The answer would be about $1,005.