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horrorfan [7]
3 years ago
8

.

Mathematics
1 answer:
I am Lyosha [343]3 years ago
6 0
Central angle  = 360 / 24  = 15 degrees

ARc length =  r * theta,    where theta is the angle in radians  and r = radius
                  = 15 * 15 * pi/180  
                  =  3.93 feet to nearest hundredth.

Area of sector =  area of circle / 24  = pi*15^2 / 24 =  29.45 ft^2 
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What is the approximate value of √65?
Juliette [100K]
Sq root of 64 =8 so sq root of 65 must be just a little larger than 8
<span>Therefore answer is between 8 & 9

</span>
6 0
3 years ago
The following table gives the scores of 30 students in a mathematics examination. Scores 90–99 80–89 70–79 60–69 50–59 Students
Pavel [41]
The given data is
Scores:      90-99  80-89  70-79  60-69  50-59
Students:   3          7           12        4          4
Because we are to take the middle value for each group.
Therefore the total score is
Sx = 3*94.5 + 7*84.5 + 12*74.5 + 4*64.5 + 4*54.5 = 2245
The number of students is 3+7+12+4+4 = 30

The mean is
m =2245/30 = 74.833

Calculate (Sx - m)² 
(Sx - m)² = 3*(94.5-74.833)² + 7*(84.5-74.833)² + 12*(64.5-74.833)²
               + 4*(64.5-74.833)² + 4*(54.5-74.833)² =  3896.7

Calculate the standard deviation
s = √(3896.7/29) = 11.592

Answer:
mean = 74.83
std. deviation = 11.59
6 0
3 years ago
2. in a class of students there are 16 gits.<br>What is the rate of boys to get in the class?​
Dima020 [189]

Answer:

I need to know how many students there are to answer this question

4 0
3 years ago
Student Name:
Katena32 [7]

The fourth proportionals are bc/a and st/r

<h3>How to determine the fourth proportional?</h3>

<u>Segments a, b and c</u>

Let the fourth segment be x.

So, we have the following equivalent ratio

a : b = c : x

Express as fraction

a/b = c/x

Make x the subject

x = bc/a

<u>Segments r, s and t</u>

Let the fourth segment be x.

So, we have the following equivalent ratio

r : s = t : x

Express as fraction

r/s = t/x

Make x the subject

x = st/r

Hence, the fourth proportionals are bc/a and st/r

Read more about proportions at:

brainly.com/question/1781657

#SPJ1

5 0
2 years ago
Put these numbers in order from least to greatest.<br> 9.9, 9.5, and 9 4/5
Mashutka [201]
9.5, 9 4/5, 9.9

9 4/5 is equal to 9.8
7 0
2 years ago
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