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neonofarm [45]
3 years ago
12

Please help me idk this

Mathematics
2 answers:
vovangra [49]3 years ago
8 0

Answer:

2.815

Step-by-step explanation:

8090 [49]3 years ago
3 0

Answer:

2.815

Step-by-step explanation:

after the decimal the order is tenths hundreds thousands... so on and so forth.

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Twenty percent of a number is 14. find the number
7nadin3 [17]
The answer is:   70  .
___________________________________________
Explanation:
_________________________________

(20/100) x = 14;  solve for "x".

(20/100) = 2/10 = 1/5 ; 

(1/5) x = 14

x/5 = 14 ; 

x = 14 * 5 ; 

x = 70 .  The answer is:  70 .
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3 years ago
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It takes 3 minutes to fill a 60 L bathing pool. What is the average rate in liters per hour
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It takes 3 minutes to fill 60L, so it takes 1 hour to fill 1200L.
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3 years ago
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Sumalee bought seven Anjou pears for<br> $5.50. How many pears can Stefan buy if<br> he has $22?
Alex17521 [72]

Answer:

4

Step-by-step explanation:

22 ÷ 5.50 = 4

Hope this helps!

5 0
2 years ago
What is the slope-intercept equation<br> for the following line
Otrada [13]

Answer:

-1/3x+1

Step-by-step explanation:

rise over run is negative

8 0
3 years ago
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Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.1 parts
satela [25.4K]

Answer:

t=\frac{6.6-7.1}{\frac{1.0}{\sqrt{26}}}=-2.550    

Step-by-step explanation:

Data given and notation  

\bar X=6.6 represent the sample mean

s=1.0 represent the sample standard deviation

n=26 sample size  

\mu_o =7.1 represent the value that we want to test

\alpha=0.01 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean is different from 7.1 ppm, the system of hypothesis would be:  

Null hypothesis:\mu = 7.1  

Alternative hypothesis:\mu \neq 7.1  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-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".  

Calculate the statistic

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

t=\frac{6.6-7.1}{\frac{1.0}{\sqrt{26}}}=-2.550    

5 0
3 years ago
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