1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bond [772]
3 years ago
12

A random sample of CO2 levels in a school has a sample mean of x¯=598.4 ppm and sample standard deviation of s=86.7 ppm. Use the

Empirical Rule to determine the approximate percentage of CO2 levels that lie between 338.3 and 858.5 ppm. Round your answer to the nearest tenth.
Mathematics
1 answer:
astraxan [27]3 years ago
6 0

Answer:

99.7%

Step-by-step explanation:

we start by getting the z-scores for the values given

We can get the z-scores using the formula below;

z-scores = (x-mean)/SD

for 338.5;

z = (338.5-598.4)/86.7 = -2.99 approximately-3

for 858.5;

z = (858.5-598.4)/86.7 = 3

so we want to get the percentages that lie within 3 standard deviations from the mean

According to the empirical rule, the percentages within 3 SD of the mean is;

100-0.15-0.15 = 99.7%

You might be interested in
A line passes through the points (2,4) and (5,6) . Select Yes or No to tell whether each equation describes this line. Equation
krek1111 [17]

\bf (\stackrel{x_1}{2}~,~\stackrel{y_1}{4})\qquad (\stackrel{x_2}{5}~,~\stackrel{y_2}{6}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{6-4}{5-2}\implies \cfrac{2}{3} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-4=\cfrac{2}{3}(x-2)

3 0
3 years ago
Factored 8x2y3-5= <br> I need the answer
ANTONII [103]

Answer: Reformatting the input :

Changes made to your input should not affect the solution:

(1): "y3" was replaced by "y^3". 1 more similar replacement(s).

STEP

1

:

Equation at the end of step 1

(23x2 • y3) - 5

STEP

2

:

Trying to factor as a Difference of Cubes

2.1 Factoring: 8x2y3-5

Theory : A difference of two perfect cubes, a3 - b3 can be factored into

(a-b) • (a2 +ab +b2)

Proof : (a-b)•(a2+ab+b2) =

a3+a2b+ab2-ba2-b2a-b3 =

a3+(a2b-ba2)+(ab2-b2a)-b3 =

a3+0+0+b3 =

a3+b3

Check : 8 is the cube of 2

Check : 5 is not a cube !!

Ruling : Binomial can not be factored as the difference of two perfect cubes

Final result :

8x2y3 - 5

5 0
3 years ago
Lmk ASAP please
Licemer1 [7]

Answer:

Step-by-step explanation:

i wear more supreme then a hype beast only blew no green dont excite me i can make a girl out your wifie

4 0
2 years ago
Amir and Marvin continue until they each flip a coin
Ahat [919]

We are told that each person flips a coin 200 times. We know that a coin has two options when heads or tails fall, therefore, the results between Amir and Marvin are compared with the number of heads and the number of tails that each one obtained.

The theoretical probability says that out of 200 times a coin is flipped by having 50% heads or tails come out, 100 must be heads and 100 must be tails, theoretically obviously speaking.

Therefore with these values it would be the comparison.

4 0
3 years ago
Read 2 more answers
In order for a ladder to reach a height of 10 feet, it needs to be placed at a 75° angle to the ground. The ground already has a
Dmitry [639]

Since the ground already has an elevation of 15 degrees, the ladder needs to

be set at 60 degrees to reach a height of 10 ft.

In order for a ladder to reach a height of 10 feet, the ladder needs to be

placed at 75 degrees angle to the ground. This is when the ground has no

angle of elevation or when it flat.

Now, if the ground has an angle of elevation of 15 degrees , the degrees in

angle the ladder needs to be set can be solved as follows:

<h3>Angles in degree: </h3>
  • 75  - 15 = 60 degrees

Therefore, the ladder needs to set at an angle of 60 degrees if the

elevation of the ground is already 15 degree. The elevation of the ground

will complement the angle in degrees required for the ladder to reach 10

feet.

learn more on elevation: brainly.com/question/9195919?referrer=searchResults

4 0
2 years ago
Other questions:
  • F (x) =5x-6 if 2f (x)
    8·1 answer
  • 9(d − 93) = –36 d = _______
    13·1 answer
  • How do I solve for 7y-4x=42 x=5y+9
    15·1 answer
  • Net sales is the difference between sales and returns.<br>True<br>False​
    7·2 answers
  • How many department stores are there
    14·1 answer
  • PQR is a right-angled triangle.
    12·1 answer
  • The change in inventories,a component of aggregate supply, comprises roughly what percentage of the GDP
    12·1 answer
  • To receive an A grade, a student must average 100 or less but more than 93. If Ethan received an A in the course and had five gr
    12·1 answer
  • Circle A has been enlarged to create circleA prime . The picture below shows the diameters of both circles.
    7·2 answers
  • Using the table, if there are 5 flowers, how many petals are there?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!