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vovikov84 [41]
3 years ago
13

Tracey paid $165 for an item that was originally priced at $570. What percent of the original price did Tracey pay? Round to the

nearest tenth of a percent. percent
Mathematics
1 answer:
kirza4 [7]3 years ago
7 0

Answer:

<h2>28.9%</h2>

Step-by-step explanation:

\frac{165}{570} = 0.2894

multiply by 100 to turn into percentage

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How many times smaller is 2 x 10-13 than 4 x 10-10
polet [3.4K]

Answer:

30/7

Step-by-step explanation:

2 x 10 -13

20 - 13

7

4 x 10 -10

40 - 10

30

7 0
3 years ago
Calculating the degrees of freedom, the sample variance, and the estimated standard error for evaluations using the t statistic
Yuliya22 [10]

Answer:

a) For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

df = n-1= 10-1=9

d.9

b) s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15

a.15

c) For this case we have the sample size n = 25 and the sample variance is s^2 =400 , the standard error can founded with this formula:

SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80

Step-by-step explanation:

Part a

For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

df = n-1= 10-1=9

d.9

Part b

From a sample we know that n=41 and SS= 600, where SS represent the sum of quares given by:

SS = \sum_{i=1}^n (X_i -\bar X)^2

And the sample variance for this case can be calculated from this formula:

s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15

a.15

Part c

For this case we have the sample size n = 25 and the sample variance is s^2 =400 , the standard error can founded with this formula:

SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80

8 0
3 years ago
Which rational number could come next?
Svetllana [295]

Answer:

maybe D

Step-by-step explanation:

3 0
3 years ago
A person reads a books at a rate of 1 word every 0.0145 seconds. How long will it take to read 3,500 words?
Ludmilka [50]

Answer:

50.75 seconds

Step-by-step explanation:

0.0145 x 3500 = 50.75 sec

I hope this helps! Have a nice day!

4 0
2 years ago
PLEASE HELP! I WILL GIVE BRAINLIEST! PLEASE SHOW YOUR WORK TOO :)!
Deffense [45]
2.75 as a fraction is 25/100 then you divided which you get 11/4 which is 2 3/4 so 2 3/5 is more hope that helped
4 0
3 years ago
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