Answer:
2,436 students
Step-by-step explanation:
At a 90% confidence level, the z-score is 1.645 and the confidence interval is given by:
Where s is the standard deviation, and n is the sample size.
If they want the length of their confidence interval to be no greater than 0.2, it must be no further than 0.1 from the mean 'X':
Rounding up to the next whole number, the sample size should be 2,436 students.
Answer:
can you say it in english
Step-by-step explanation:
The scale of the drawing is 6 feet = 17 inches
Scaling is the process of increasing or reducing the size of a figure by a factor k.
In the given statement is:
Shane made a scale drawing of a hotel. a room in the hotel, which is 18 feet wide in real life, is 51 inches wide in the drawing.
A figure which is 18 feet wide in real life, is 51 inches wide in the drawing, hence the scale is:
Now, According to the question is
18 feet = 51 inches
Divide both sides by 3:
6 feet = 17 inches
Therefore, the scale of the drawing is 6 feet = 17 inches
Learn more about The scale of drawing at:
brainly.com/question/21904606
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Zara should have added rather than subtracting, adding would have balanced the equation
If you subtract, like Zara, then you woulg have 39-12=-24, not what you want
Answer:
(-3, 0)
Step-by-step explanation:
Dilation means that the position of the point is scaled up or down. Simply multiply the coordinates by the scale to get the new position.
w' = 3/2 w
w' = (3/2 × -2, 3/2 × 0)
w' = (-3, 0)
