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
Aleonysh [2.5K]
3 years ago
14

Can Someone help me please I don't understand

Mathematics
1 answer:
Sindrei [870]3 years ago
8 0

Answer:

c i think

Step-by-step explanation:

it's c i think

You might be interested in
A graduate school entrance exam has scores that are normally distributed with a mean of 560 and a standard deviation of 90. What
9966 [12]

26.8% of examinees will score between 600 and 700.

This question is based on z score concept.

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the mean. If a Z-score is 0, it indicates that the data point's score is identical to the mean score.

z={x-\mu  \over \sigma }

where:

μ is the mean

σ is the standard deviation of the population

Given:

μ = 560

σ = 90

For

600≤ X≤700

for x = 700

Z score =x - μ/σ

=(700 - 560)/90

      = 1.55556

P-value from Z-Table:

P(560<x<700) = P(x<700) - 0.5 = 0.44009

for x = 600

Z score =x - μ/σ

=(600 - 560)/90

      = 0.44444

P-value from Z-Table:

P(560<x<600) = P(x<600) - 0.5 = 0.17164

∴ P(600<x<700) = P(560<x<700) - P(560<x<600)

                           = 0.44009 - 0.17164

                          =0.26845

∴26.8% percentage of examinees will score between 600 and 700.

Learn more about Z score here :

brainly.com/question/15016913

#SPJ4

4 0
1 year ago
martin can run 6 miles in 60 minutes. He wants to run in either one of two upcoming races, a 4 mile race or a 12 mile race. At h
just olya [345]

Answer:

4 mile= 40

12 mile= 120

it will take him 80

Step-by-step explanation:

6 0
3 years ago
How many solutions can be found for the linear equation? 4(x + 5) - 5 = 8x + 18/ 2
mylen [45]

Answer: The correct option is A.

Explanation:

The given equation is,

4(x+5)-5=\frac{8x+18}{2}

Multiply both sides by 2.

2[4(x+5)-5]=\frac{8x+18}{2}

8(x+5)+2(-5)=8x+18

8x+40-10=8x+18

8x+30=8x+18

Subtract both sides by 8x.

30=18

This statement is false for any value of x, therefore the system of equation have no solution and option A is correct.

6 0
3 years ago
Read 2 more answers
Josey can run 10 laps in 8 minutes. How long this it take her to run 15 laps?
kvasek [131]
It will takes Horst 12 minutes to run 15 laps
4 0
2 years ago
The average estimated hours a person in the United States spent playing video games per year from 2002 to 2012 were 71, 80, 82,
ozzi

Answer:

Population variance 579

Population standard deviation 24

Step-by-step explanation:

The average estimated hours a person in the United States spent playing video games per year from 2002 to 2012 were 71, 80, 82, 78, 80, 91, 107, 121, 125, 131, and 142.

The population variance is given by:

\sigma^2=\frac{\sum(x-\mu)^2}{n}

\mu=\frac{71+80+82+78+80+91+107+121+125+131+142}{11}

\mu=\frac{1108}{11}

This implies that:

\sigma^2=\frac{(71-\frac{1108}{11})^2+(80-\frac{1108}{11})^2+(82-\frac{1108}{11})^2+(78-\frac{1108}{11})^2+(80-\frac{1108}{11})^2+...+(142-\frac{1108}{11})^2}{11}

\sigma^2=\frac{70006}{121} =579 to the nearest whole number

The population standard deviation is

\sigma=\frac{\sqrt{70006} }{11}=24 to the nearest whole number.

3 0
3 years ago
Read 2 more answers
Other questions:
  • The red line segment on the number line below represents the segment from A to B, where A = -5 and B = 5. Find the value of the
    14·1 answer
  • -1.3n =7.8 need help​
    15·1 answer
  • Which equation could be used to create the graph? <br> Look at pic too! Help plz thx
    8·1 answer
  • The angles shown above form a linear pair. Show all of your work for full credit.
    13·1 answer
  • PLEASE HELP ASAP I can’t fail this
    13·1 answer
  • When running multiple machines in a factory, the total sound power in decibels (dB) can be estimated using the regression equati
    5·1 answer
  • When solving a mass/particle or particle/mass conversion calculation what piece(s)
    10·1 answer
  • Carbon is found in ALL of these materials seashells, wood, plants, and water.
    10·1 answer
  • Helpppppppppppppppppp
    10·2 answers
  • The table represents a function.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!