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
pshichka [43]
3 years ago
15

PLEASE HELP ME Simplify the expression 2/ square root of 7.

Mathematics
1 answer:
tester [92]3 years ago
5 0

Answer:

Decimal Form:  5.29150262

Step-by-step explanation:

Brainliest?

You might be interested in
Quick anyone know the answer?
den301095 [7]
The sum of the measures of angles in all quadrangles is 360 °. Therefore:

(25x+1)+(25x-2)+(20x-1)+82=360\\\\70x+80=360\ \ \ |-80\\\\70x=280\ \ \ |:70\\\\x=4

m\angle D=(20x-1)^o\to m\angle D=(20\cdot4-1)^o=79^o\\\\Answer:\ B.\ 79^o

8 0
3 years ago
The Wall Street Journal reports that 33% of taxpayers with adjusted gross incomes between $30,000 and $60,000 itemized deduction
Len [333]

Answer:

(a) <em>                             </em><em>n</em> :      20           50          100         500

P (-200 < <em>X</em> - <em>μ </em>< 200) : 0.2886    0.4444    0.5954    0.9376

(b) The correct option is (b).

Step-by-step explanation:

Let the random variable <em>X</em> represent the amount of deductions for taxpayers with adjusted gross incomes between $30,000 and $60,000 itemized deductions on their federal income tax return.

The mean amount of deductions is, <em>μ</em> = $16,642 and standard deviation is, <em>σ</em> = $2,400.

Assuming that the random variable <em>X </em>follows a normal distribution.

(a)

Compute the probability that a sample of taxpayers from this income group who have itemized deductions will show a sample mean within $200 of the population mean as follows:

  • For a sample size of <em>n</em> = 20

P(\mu-200

                                           =P(-0.37

  • For a sample size of <em>n</em> = 50

P(\mu-200

                                           =P(-0.59

  • For a sample size of <em>n</em> = 100

P(\mu-200

                                           =P(-0.83

  • For a sample size of <em>n</em> = 500

P(\mu-200

                                           =P(-1.86

<em>                                  n</em> :      20           50          100         500

P (-200 < <em>X</em> - <em>μ </em>< 200) : 0.2886    0.4444    0.5954    0.9376

(b)

The law of large numbers, in probability concept, states that as we increase the sample size, the mean of the sample (\bar x) approaches the whole population mean (\mu_{x}).

Consider the probabilities computed in part (a).

As the sample size increases from 20 to 500 the probability that the sample mean is within $200 of the population mean gets closer to 1.

So, a larger sample increases the probability that the sample mean will be within a specified distance of the population mean.

Thus, the correct option is (b).

8 0
3 years ago
How do I find the volume of an L-block?
DIA [1.3K]
First break the L into two rectangular prisms and then find the volume for each prism. Then add those two volumes together to get the L.
5 0
3 years ago
Read 2 more answers
Please please answer this correctly. Please take a pic of the same screenshot of put the right plots correctly
sergeinik [125]

Answer:

Picture

Step-by-step explanation:

I graphed them

4 0
3 years ago
A skydiver jumped out of a plane descended 0.8 miles in 2.5 minutes. What is the skydiver average change of altitude per minute?
Illusion [34]

.3

Because .8 divided by 2.5 equals .3

8 0
3 years ago
Read 2 more answers
Other questions:
  • The mean time it takes for workers at a factory to insert a delicate bolt into an engine is 15 minutes. The standard deviation o
    15·1 answer
  • Find the distance between the points (2,-1) and (-1,-4). Round your answer to the nearest hundredth.
    9·1 answer
  • find the area and perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approx
    10·1 answer
  • 12 ft equal how many inches​
    9·1 answer
  • Write a function using cotangent that would create the graph of y = tan(x).
    6·1 answer
  • Billy takes out a $2400 discounted loan using a simple interest rate of 8% for a period of 18 months. What is the effective inte
    5·2 answers
  • What is 3.47 divided by 8
    12·2 answers
  • Help me pleaseeeeeeeeeeee
    8·1 answer
  • Whats the surface area?
    12·1 answer
  • Read the following statement: Line segment MN is congruent to line segment OP.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!