First let's find the GCF of 27, 36, and 72: -->Find the factors of each number: 27: 1, 3, 9, 27 36: 1, 2, 3, 4, 9, 12, 18, 36 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72 -->Now look for the factors they have in common. 1, 3, and 9 -->Now see which one is the biggest number in value 9 --> So therefore, 9 is the GCF
Now let's find the LCM of 7, 4, 10, and 12 -->Start listing all the multiples of of each number 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40... 420 7: 7, 14, 21, 28, 35, 42, 49, 56, 64, 70... 420 10: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 120... 420 12: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120... 420 (sorry got bored of typing so I fast forwarded at the '...'s) --> The least number in value that they have in common is the LCM of those numbers The LCM is 420
*Just saying that took forever to do that LCM part but not way too long thank goodness :p
LCM= 420 When you list the numbers and their multiples, you keep on listing it until you get a same #. GCF= 9 The GCF is 9. Try the birthday cake method- :0
First, put all the #s together and organized on a rectangular box.
Then, see what goes into all of the #s. Write that # down on the left side of the "cake" (the box). Keep on doing it until their is no common # that goes into them both.
You then add all of the #s that are on the side of the birthday cake.
*If that is the only # that goes into the #s, it is just that #.
Using correlation coefficients, it is found that that the correct option is given as follows:
The correlation would stay the same because the change in units for time would have no effect on it.
<h3>What is a correlation coefficient?</h3>
It is an index that measures correlation between two variables, assuming values between -1 and 1.
If it is positive, the relation is positive, that is, they are direct proportional. If it is negative, they are inverse proportional.
If the absolute value of the correlation coefficient is greater than 0.6, the relationship is strong.
The correlation coefficient does not have units, hence if the units of the measures is changed, the coefficient remains constant, which means that the correct option is given by:
The correlation would stay the same because the change in units for time would have no effect on it.
Let's start with the drawing. (See the drawing at the bottom of this answer.)
Draw a vertical segment. At the bottom endpoint, draw a horizontal segment to the right. The angle at the bottom left is a right angle. So far this should look like an "L" shape. The vertical segment is the wall, and the horizontal segment is the ground.
Now draw a segment that connects the right endpoint of the horizontal segment and the top endpoint of the vertical segment. Now you have a right triangle. The diagonal segment represents the ladder. The diagonal segment is the hypotenuse. Label the diagonal segment, the hypotenuse, 12 ft. Label the vertical segment, the wall, 11.8 ft.
The angle at the bottom right is A. It is the angle the ladder makes with the ground. This angle cannot be greater than 75 degrees.
Now we use trigonometry to find the measure of angle A.
For this right triangle, and its angle A, you have a hypotenuse that measures 12 ft, and an opposite leg that measures 11.8 ft. We need to find angle A. The trig ratio that relates the opposite leg and the hypotenuse is the sine.
Since the sine of angle A equals 0.98333, we use the inverse sine function to find the measure of angle A.
Answer: The angle the ladder makes with the ground is 79.5 degrees which is greater than 75 degrees, so the ladder it will be unsafe in this position.