Answer:
0.13% of students have scored less than 45 points
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
About what percent of students have scored less than 45 points?
This is the pvalue of Z when X = 45. So
has a pvalue of 0.0013
0.13% of students have scored less than 45 points
Answer:
D because climate change can kill people
Answer:
- y = 1.8x +53.7
- 73.5 in 2005
Step-by-step explanation:
The 2-point form of the equation of a line is useful here. It tells you that for the points (x1, y1) and (x2, y2) the line can be written as ...
y = (y2 -y1)/(x2 -x1)(x -x1) + y1
For your given points, this is ...
y = (60.9 -57.3)/(4 -2)(x -2) +57.3
y = 1.8(x -2) +57.3
y = 1.8x +53.7 . . . . . simplify
__
For x = 11 (in 2005), the predicted value is ...
y = 1.8·11 +53.7
y = 73.5
Answer:
- <u><em>The place value of micrometers is the millionths.</em></u>
Explanation:
<em>Place value</em> is how much a digit is worth according to the position it has in the number.
In a one digit number, the only digit is in the place of the ones. That means, that the digit is itself. For instance 8, values 8 × 1, because it is in the place of the ones.
In a two digit numbers, the number to the right is in the place of the ones, and the number to the left is in the place of the tens. Then, the number on the left values 10 times itself. For instance in the number 28, 8 values 8×1 and 2 values 2×10 = 20. That makes 20 + 8 = 28.
From rigth to left the place values are:
- Ones
- Tens
- Hundreds
- Thousands
- Ten-thousands
- Hundred-thousands
- Millions
For the decimals, you count the place values from left to right. They are:
- Tenths
- Hundreths
- Thousandths
- Ten-thousanths
- Hundred-thousanths
- Millionths
Micrometers is a unit that is one-millionth of a meter:
- 1 mcirometer = 10⁻⁶ meter
- 1 micrometer = 0.000001 meter
Hence, the place value of micrometers is the millionths.
