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yawa3891 [41]
3 years ago
11

The grade point average in an econometrics examination was normally distributed with a mean of 75. in a sample of 10 percent of

students it was found that the grade point average was greater than 80. can you tell what the standard deviation of the grade point average was?
Mathematics
1 answer:
podryga [215]3 years ago
8 0
<span>No. From the data provided you can not determine what the standard deviation is. In order to determine the standard deviation you need the actual grades not just a mean.</span>
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Please help me solve this question. Will make you the
zmey [24]

The relation you have shown is not a function.

In order to be a function, a relation's domain must be continuous in that no x-value is not repeated in any of the points. Since the first two points of the relation are (5,1) and (5,3), you can see that they have the same x-value, meaning that this is not a function.

One quick way you could test this is to quickly sketch a graph and use the vertical line test to see if the relation in question is a function. If it cross the vertical line once in all places, it is a function - if it crosses the vertical line more than once in any place, it is not a function.

6 0
3 years ago
The second sentence expresses a relationship between the two unknowns, so we'll use it to write our first mathematical expressio
Nadya [2.5K]

9514 1404 393

Answer:

  C. 2c+12

Step-by-step explanation:

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To get 2 times, we multiply by 2. To get 12 more, we add 12.

3 0
3 years ago
Your estimate that the length of a board is 24 feet. The actual length of the board is 22 feet. Find the percent error.
Tresset [83]

Answer:

9.09%

Step-by-step explanation:

You over estimated by 2 feet.  Find out how much 2 feet of 22 is by dividing 2 by 22...

2/22 = 0.090909090909

To convert a decimal to a percent, multiply the decimal by 100%

0.0909090909(100%) = 9.0909090909% or 9.09%

5 0
3 years ago
find the area of the triangle. please check my answer!! i need it done now! :( no one will help ive reposted it a few times now
mina [271]

Answer:

A = 437 mm²

Step-by-step explanation:

The general formula for the area of a triangle:

A = \frac{1}{2}bh, where 'b' is the measure of the base and 'h' is the measure of the height

Given the dimensions of the triangle in the picture:

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7 0
3 years ago
Which answer is correct and why?
Ivanshal [37]
The answer is C.) 62.
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3 0
4 years ago
Read 2 more answers
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