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nirvana33 [79]
3 years ago
11

Please help. This question is on geometric sequences

Mathematics
1 answer:
Lyrx [107]3 years ago
4 0

Answer:

13.89 to 2 dec places.

Step-by-step explanation:

a7 / a5 = r^2   where r is the common ratio.

So 3/5 = r^2

r^2 = 0.6

r = +√0.6

r = 0.7746.

The first term is a5 / r^4

= 5 / (0.7746)^4

= 13.89.

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The answer would be 6.4% because you have to do 16% of 40 and it will give you 6.4 and as a percent it is 640%
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Hi please help me with this i’ll give brainliest if you give a correct and show your work!
Tatiana [17]
1. (1.35)x(.42)

1.35
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6 0
3 years ago
The sum of two consecutive odd numbers is 284. Find each number please.
Vlad [161]
We can solve this by finding one of the numbers first
Let the smaller number be y. 
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Therefore, 
y + (y+2) = 284
2y +2 = 284
shift +2 to the other side and turn it into -2
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shift x2 to the other side and turn it into /2
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Now we got the smaller number, which is 141, we can also find the larger number by adding 2 to it. 141+2 = 143, 
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8 0
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Read 2 more answers
A simple random sample of size nequals15 is drawn from a population that is normally distributed. The sample mean is found to be
Bond [772]

Answer with explanation:

To test the Significance of the population which is Normally Distributed we will use the following Formula Called Z test

   z=\frac{\Bar X - \mu}{\frac{\sigma}{n}}

\Bar X =31.1\\\\ \sigma=6.3\\\\ \mu=25\\\\n=15\\\\z=\frac{31.1-25}{\frac{6.3}{\sqrt{15}}}\\\\z=\frac{6.1\times\sqrt{15}}{6.3}\\\\z=\frac{6.1 \times 3.88}{6.3}\\\\z=3.756

→p(Probability) Value when ,z=3.756 is equal to= 0.99992=0.9999

⇒Significance Level (α)=0.01

We will do Hypothesis testing to check whether population mean is different from 25 at the alpha equals 0.01 level of significance.

→0.9999 > 0.01

→p value > α

With a z value of 3.75, it is only 3.75% chance that ,mean will be different from 25.

So,we conclude that results are not significant.So,at 0.01 level of significance population mean will not be different from 25.

3 0
3 years ago
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