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Virty [35]
3 years ago
5

Help me please): I’m stuck

Mathematics
2 answers:
sineoko [7]3 years ago
6 0
Pi x 1squared = 3.14 cm
Scorpion4ik [409]3 years ago
5 0

Answer:

A=3.14 cm^2

Step-by-step explanation:

In order to calculate the area of the circle:

$A = \pi r^2  $

$A = \pi 1^2  $

$A = \pi  $

A=3.14 cm^2

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PLEASE SOLVE AND CHECK. SHOW COMPLETE SOLUTION
Kipish [7]

Answer:

i m not able to give the answer to you

4 0
2 years ago
I have the answer but I have to show work help?
Marina86 [1]
See attached picture for steps

4 0
3 years ago
Given the function defined in the table below, find the average rate of change, in simplest form, of the function over the inter
worty [1.4K]
The answer would be 7
7 0
3 years ago
Candice is preparing for her final exam in Statistics. She knows she needs an 65 out of 100 to earn an A overall in the course.
sertanlavr [38]

Answer:

a. 72

b. 816

c. 570

d. 30

Step-by-step explanation:

Given the graph is a bell - shaped curve. So, we understand that this is a normal distribution and that the bell - shaped curve is a symmetric curve.

Please refer the figure for a better understanding.

a. In a normal distribution, Mean = Median = Mode

Therefore, Median = Mean = 72

b. We have to know that 68% of the values are within the first standard deviation of the mean.

i.e., 68% values are between Mean  Standard Deviation (SD).

Scores between 63 and 81 :

Note that 72 - 9 = 63 and

72 + 9 = 81

This implies scores between 63 and 81 constitute 68% of the values, 34% each, since the curve is symmetric.

Now, Scores between 63 and 81 =  

= 68 X 12 = 816.

That means 816 students have scored between 63 and 81.

c. We have to know that 95% of the values lie between second Standard Deviation of the mean.

i.e., 95% values are between Mean  2(SD).

Note that 90 = 72 + 2(9) = 72 + 18

Also, 54 = 63 - 18.

Scores between 54 and 90 totally constitute 95% of the values. So, Scores between 72 and 90 should amount to  of the values.

Therefore, Scores between 72 and 90 =  

= 570.

That is a total of 570 students scored between 72 and 90.

d. We have to know that 5 % of the values lie on the thirst standard Deviation of the mean.

In this case, 5 % of the values lie between below 54 and above 90.

Since, we are asked to find scores below 54. It should be 2.5% of the values.

So, Scores below 54 =  

= 2.5 X 12 = 30.

That is, 30 students have scored below 54.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Solve. −3/5x +1/5 > 7/20
Reika [66]
-3/5x + 1/5 > 7/20
-3/5x > 7/20 - 1/5
-3/5x > 7/20 - 4/20
-3/5x > 3/20
x < 3/20 * - 5/3
x < -15/60 reduces to -1/4

3 0
3 years ago
Read 2 more answers
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