3 years ago

BRAINLIEST TO FIRST PERSON! Which one is the correct answer?

Mathematics

1 answer:

Tamiku [17]3 years ago

3 0

Answer:

Option 3 is not conclude or whatever that means lol, i just know it

Step-by-step explanation:

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a rectangle swimming pool has a volume capacity of 2160 cubic feet.water is being added to the pool at a rate of about 20 cubic

natta225 [31]

2 hours
2160=20x
2160/20=108
108/60=2 hours

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3 years ago

Five years ago Gary invested $10,000 into an account that makes 6% compounded annually. The value in the account after x years i

dlinn [17]

$y=10000(1.06)^x
\\y(5)=10000(1.06)^5
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3 years ago

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I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!

dalvyx [7]

Answer:

−b4+2b2+35

Step-by-step explanation:

b2+5)(−b2+7)

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3 years ago

A plant grows 3 centimeters in 10 days. How much does it grow per day? Write your answer as a fraction in simplest form

ASHA 777 [7]

It grew 3/10, which equals 0.3 centimeters every day, and as a fraction, 3/10 would be the answer.

3/10 is the answer.

Hope this helps, and have a nice day!

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9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9

gladu [14]

Answer: a) (176.76,172.24), b) 0.976.

Step-by-step explanation:

Since we have given that

Mean height = 174.5 cm

Standard deviation = 6.9 cm

n = 50

we need to find the 98% confidence interval.

So, z = 2.326

(a) Construct a 98% confidence interval for the mean height of all college students.

$x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)$

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

$\dfrac{\sigma}{\sqrt{n}}\\\\=\dfrac{6.9}{\sqrt{50}}\\\\=0.976$

Hence, a) (176.76,172.24), b) 0.976.

8 0

3 years ago