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
9966 [12]
3 years ago
5

Ejercicio 3: mi casa tiene medidas 5m de ancho por 15 de largo. Se quieren cubrir 72 m2 con baldosas

Mathematics
2 answers:
In-s [12.5K]3 years ago
6 0

Answer:

a

Step-by-step explanation:

Mandarinka [93]3 years ago
3 0
A:))))))))))))))))))))))))
You might be interested in
Please answer quickly thanks :) good morning btw
Alisiya [41]

1. 1/9

2. 0

3. -9

4. -1

Reasoning: To get the opposite of a number just add a negative sign or take it away. This can be done to all numbers other than 0

8 0
3 years ago
How could work hours and shedule affect how attractive a job is?
Pani-rosa [81]
Less working hours is what every one dreams of....
and schedule in the way that it is flexible according to the employee's daily routine and the person gets enough time to relax and enjoy time to oneself
6 0
2 years ago
Read 2 more answers
Sulfur compounds cause "off-odors" in wine, so winemakers want to know the odor threshold, the lowest concentration of a compoun
aev [14]

Answer:

a) 29.4-1.96\frac{7}{\sqrt{10}}=25.06  

29.4+1.96\frac{7}{\sqrt{10}}=33.74  

So on this case the 95% confidence interval would be given by (25.06;33.74)  

b) z=\frac{29,4-25}{\frac{7}{\sqrt{10}}}=1.988  

p_v =P(z>1.988)=0.0234    

If we compare the p value and the significance level given \alpha=Step-by-step explanation:Previous conceptsA confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  
The margin of error is the range of values below and above the sample statistic in a confidence interval.  
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  
Part a
Data given: 30 30 42 35 22 33 31 29 19 23
We can calculate the sample mean with the following formula:[tex] \bar X = \frac{\sum_{i=1}^n X_i}{n}= 29.4 the sample mean

\mu population mean (variable of interest)  

\sigma=7 represent the population standard deviation  

n=10 represent the sample size  

95% confidence interval  

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}} (1)  

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that z_{\alpha/2}=1.96  

Now we have everything in order to replace into formula (1):  

29.4-1.96\frac{7}{\sqrt{10}}=25.06  

29.4+1.96\frac{7}{\sqrt{10}}=33.74  

So on this case the 95% confidence interval would be given by (25.06;33.74)  

Part b

What are H0 and Ha for this study?  

Null hypothesis:  \mu \leq 25  

Alternative hypothesis :\mu>25  

Compute the test statistic

The statistic for this case is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

We can replace in formula (1) the info given like this:  

z=\frac{29,4-25}{\frac{7}{\sqrt{10}}}=1.988  

Give the appropriate conclusion for the test

Since is a one side right tailed test the p value would be:  

p_v =P(z>1.988)=0.0234  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis.    

8 0
3 years ago
Use formulas to find area
aivan3 [116]
120.08 u just had to multiply
3 0
3 years ago
Read 2 more answers
80% of x is equal to 100.<br><br> Find x.
xeze [42]

The number is 125 and the equation is 0.8x = 100

Step-by-step explanation:

80% of x is equal to 100.

Write an equation that shows the relationship of 80%, x, and 100

80% = 0.8

0.8x = 100

x = 100/0.8

x = 125

The number is 125 and the equation is 0.8x = 100

5 0
3 years ago
Read 2 more answers
Other questions:
  • Jordon works for a landscaping company during his summer vacation. He is paid $12 per hour for mowing lawns and $14 per hour for
    9·1 answer
  • Simplify 8k+2+4k+(-3k)+5
    15·2 answers
  • Equivalent to (81 m6) 1/2
    6·1 answer
  • Find the slope and the y-intercept for y=-5x
    13·1 answer
  • What is the exact value of 11.68 - 0.48 ÷ (-1.6) =
    10·2 answers
  • Carmen has $30 in store bucks and a 25% discount coupon for a local department store. What maximum dollar amount can Carmen purc
    7·2 answers
  • The formula for the circumference, C, of a circle with radius r is given.
    12·1 answer
  • Which of the following is the correct factored form for the given equation? 2x^2+8x+6=0
    9·1 answer
  • Like this is this correct or wrong
    14·2 answers
  • Please answer number 15 I’ll give brainliest thanks!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!