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Gennadij [26K]
3 years ago
10

If the variance is 28 kg2 what is the standard deviation?

Mathematics
1 answer:
ikadub [295]3 years ago
7 0

Answer:

The standard deviation is 5.29 kg.

Step-by-step explanation:

The standard deviation is the square root of the variance. Mathematically, we have that:

S(X) = \sqrt{V(X)}

In this problem, we have that:

V(X) = 28

So

S(X) = \sqrt{V(X)}

S(X) = \sqrt{28}

S(X) = 5.29

The standard deviation is 5.29 kg.

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NNADVOKAT [17]
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6 0
2 years ago
4. In one semester, Doug and Laura spent a combined 230 hours in the tutoring lab. If Doug
IRISSAK [1]

Answer:

80 hours

Step-by-step explanation:

let d represent doug, let l represent laura

first, set up a system of equations representing the problem:

since doug spent 10 less than twice the hours laura did, and we know that the total amount of hours they spent together is 230:

l=2d+10

d+l=230

then solve:

*first i rearranged the equations so i can solve this system of equations using elimination method*

l-2d=10

l+d=230

*subtract*

3d=240

d=80

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6 0
3 years ago
Read 2 more answers
2. In a school of 320 students, 85 students are in the band, 200 students are on sports teams, and 60 students
Alja [10]

Answer:

<u>60</u> students are involved in either band or sports.

<u>95</u> students  are not involved in either sports or band.

Step-by-step explanation:

Given:

In a school of 320 students, 85 students are in the band, 200 students are on sports teams, and 60 students  participate in both activities.

Now, to find the students  are involved in either sports or band. And students who are not involved in either sports or band.

<em>Total number of students</em> = 320.

Number of students in the band = 85.

Number of students in the sports team = 200.

Number of students participate in both activities = 60.

Thus, 60 students are involved in either band or sports.

So, the number of students in the band adding number of students in the sports team we get:

200 + 85 = 285.

Then, to subtract the number of students participate in both activities we get:

285 - 60 = 225.

<em>Thus, the remaining students are </em>= 225.

Now, to get the students  who are not involved in either sports or band we subtract the total number of students from the remaining students:

320-225

=95.

Therefore, 60 students are not involved in either band or sports. 95 students  are not involved in either sports or band.

8 0
3 years ago
A) converts into minutes 4 hours 30 minutes​
storchak [24]

Answer:

270 Minutes

Step-by-step explanation:

4hours = 240 Minutes

+30 minutes = 270 Minutes

4 0
3 years ago
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I need help ASAP plx
ElenaW [278]

Answer: good thinking

Step-by-step explanation:

here is the answer idk

7 0
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