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
inna [77]
3 years ago
14

Simplify 2/√5

Mathematics
1 answer:
Arada [10]3 years ago
4 0
The answer would be 2√5/5

As a rule, you cannot have any radical as a denominator. That's why you gotta multiply √5 with √5 which would be √25. The square root of this is 5, and now you have disposed of the radical! Hurray. However, keep in mind, that when you multiply √5, you also multiply it to the numerator. So, yeah, after this, you get the answer.

Hopefully, my explanation makes sense. :)
You might be interested in
What must be true to define the measure of a distance of an arc between the points A and B on a circle? A unit of measure must b
Leno4ka [110]
A.) A unit of measure must be defined for distance    
6 0
3 years ago
Read 2 more answers
Round to the nearest dollar.<br> ​$7,562.36
Elan Coil [88]

Answer:

the answer should be $7,562.00

8 0
2 years ago
The data below gives the number of speeding tickets given per day at a certain location on a highway over a two-week period.
kramer
Do you have the rest of the answers ? 

6 0
3 years ago
The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a standard deviation of 6.9 centime
Minchanka [31]

Answer:

Step-by-step explanation:

Hello!

For me, the first step to any statistics exercise is to determine what is the variable of interest and it's distribution.

In this example the variable is:

X: height of a college student. (cm)

There is no information about the variable distribution. To estimate the population mean you need a variable with at least a normal distribution since the mean is a parameter of it.

The option you have is to apply the Central Limit Theorem.

The central limit theorem states that if you have a population with probability function f(X;μ,δ²) from which a random sample of size n is selected. Then the distribution of the sample mean tends to the normal distribution with mean μ and variance δ²/n when the sample size tends to infinity.

As a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

The sample size in this exercise is n=50 so we can apply the theorem and approximate the distribution of the sample mean to normal:

X[bar]~~N(μ;σ2/n)

Thanks to this approximation you can use an approximation of the standard normal to calculate the confidence interval:

98% CI

1 - α: 0.98

⇒α: 0.02

α/2: 0.01

Z_{1-\alpha /2}= Z_{1-0.01}= Z_{0.99} =2.334

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

174.5 ± 2.334* \frac{6.9}{\sqrt{50} }

[172.22; 176.78]

With a confidence level of 98%, you'd expect that the true average height of college students will be contained in the interval [172.22; 176.78].

I hope it helps!

4 0
3 years ago
Find the value of (-3/8) x (+8/15
Mekhanik [1.2K]

\frac{ - 3}{8}  \times  \frac{8}{15}  \\  \\  = \frac{  \cancel{- 3}}{ \cancel8}  \times  \frac{ \cancel8}{ \cancel{15}} \\  \\  =  -  \frac{1}{5}

Hope This Helps ~

8 0
2 years ago
Other questions:
  • Prove that the vector product (also called the cross product) of vectors in 3 dimensional space, does not satisfy an associative
    5·1 answer
  • Pre-Calc<br><br> Please help with the question highlighted in red
    9·1 answer
  • What is 5 divided by n plus 3
    5·1 answer
  • The number of bacteria in a culture grows at a rate that is proportional to the number present. initially, there were 10 bacteri
    11·1 answer
  • Need answers to 30 and 31
    7·1 answer
  • Graph each absolute value function. State the domain, range, and y-intercept.
    5·2 answers
  • PLEASE HELP ASAP
    9·1 answer
  • Solve the inequality for u.​
    6·1 answer
  • Translate 4 left and then reflect over the y axis<br><br> Please hurry
    6·2 answers
  • F
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!