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sergiy2304 [10]
4 years ago
12

20 POINTS FOR GEOMETRY QUESTION!!

Mathematics
1 answer:
SIZIF [17.4K]4 years ago
6 0
The answer is 1/4 



Explanation
===============================
The question focuses on "if the student is known to be a boy..."  we would obviously know that we would focous on only the total of the boys.    

We have the formula for the probability of an event of happening which we would call event A (a boy being left-handed).  P(A)= number of favorable outcomes/ total number of possible outcomes.  The left-handers would go in the favorable outcomes since we want the probability of a boy being left handed and we would place the total boys in the total number of possible outcomes since all of them are going to be the one to be randomly picked.    50 left-handed/ 200 total boys.   We have our fraction that is 50/200 as the probability but we can simplify it!   We simplify 50/200 to get 1/4!!!  1/4 is the probability of a boy being picked that is left-handed!

Hope this helps!
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alina1380 [7]

Answer:

Step-by-step explanation:

Let's start with this.  When do you think the mean would NOT be an appropriate measure of center?  Well, maybe your  data points are 1,2,4,1,5,3, 1,000,000.  If you took the mean of that it wouldn't be anywhere near any of the numbers, and would just be in between two.  So not in the center at all.  

The point is you want your data set well balanced.  You want about an equal number on one side as the other.  So let's look at yours.  

The furthest away from the middle has 11 on the left side and 12 on the right.  If youw ere weighing them on a scale and took the 11 and 12 as the weight, they would be pretty close to equal.  The next two are 21 and 23.  Less close, but still only two away.  The middle is the middle, so nothing to balance it out with.  If you look at it as a whole, the right side is 3 more than the left.  I would say 3 is still pretty close when you are looking at "weights" above 10.  So I would say mean is a pretty appropriate measure of center.  

Stats takes a lot of "gut feelings" like this.  Thinking, "yeah, these are pretty close" so you'll get the hang of it pretty soon.  

6 0
4 years ago
At a point on the ground 46 feet from the foot of a tree, the angle of elevation of the top of the tree is 68 degrees. What is t
Mandarinka [93]

Answer:

114 ft

Step-by-step explanation:

Imagine or construct a right triangle with the 46 ft leg lying on the ground.  This is the "adjacent side" of the triangle; it lies immediately adjacent to the 68 degree angle.  The side opposite this angle is h, the height of the tree.

The tangent function includes angle, opp side and adj side:

tan 68 degrees = opp / adj = h / (46 ft), and so:

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3 years ago
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3 years ago
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Murrr4er [49]
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\frac { 16 }{ \frac { 1 }{ 2 }  } \\ \\ We\quad can\quad rewrite\quad \\ this\quad expression\quad as\quad :\\ 16\cdot \frac { 2 }{ 1 } \\ and\quad that\quad is\quad equal\quad to\\ 16\cdot 2=32\\ \\ \\

When you divide a number by a fraction, you can flip the fraction upside down and multiply it with the number, the result will be same.

4 0
4 years ago
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Answer:

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