Answer:
<h2>
The standard error of the mean is 7.56</h2>
Step-by-step explanation:
The standard error of the mean is defined as the ratio of standard deviation to the square root of the sample size of a data. The standard error of the mean is mathematically expressed as shown below;
X is the standard error of the mean
is the standard deviation
n is the sample size.
Given;
On substitution into the formula we have;
X ≈ 7.56
Answer:
Step-by-step explanation:
<u>Area Of A Cube
</u>
Suppose a cube with side length s, the area of one side is
Since the cube has 6 sides, the total area is
But if we have the area, we can solve the above formula for s to get
We have two different cubes with areas 1,200 square inches and 768 square inches. Let's compute their side lengths
The difference between them is
The side of the cube with area 1,200 square inches is longer then the side of the cube with area 768 square inches
Solve for the value of Y using the first equation, 3x-7, and then plug in 3x-7 wherever you see Y, because Y=3x-7. You can find X and then use that value of X and plug it into the equation to solve for Y
You can make them have the same denominator and then compare
so as you can see,
C - 2c = 2c - 2c - 4
c - 2c = -4
-c = -4
c = 4