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Agata [3.3K]
3 years ago
5

A hose with a larger diameter working alone can fill a swimming pool in 9 hours. A hose with a smaller diameter working alone ca

n fill a swimming pool in 18 hours. Working together, how long would it take the two hoses to fill the swimming pool?
Mathematics
1 answer:
Vilka [71]3 years ago
4 0

- The rate of the hose with the large diameter is:

  Answer: A). 1/9.

- What is the unknown in the problem?

  Answer: C). the time it takes for the hoses working together to fill the pool

-What part of the job does the hose with the large diameter do?

  Answer: B). x/9

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A Boxerville Express commuter train leaves the station every 30 minutes. When Theo arrives at the station, a woman tells him she
Anni [7]

Answer:

B: 20 minutes

Step-by-step explanation:

Because it comes every 30 minutes and he is 10 minutes late we do

30-10=20

Therefore he has to wait 20 minutes for the next train.

8 0
3 years ago
I made this IMPOSSIBLE Question to see who can answer it correctly<br> (GIVING BRAINLIEST)
zhuklara [117]

Answer:

im assuming c

Step-by-step explanation:

ut i think im wrong. the false statement goes with a though

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3 years ago
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The area of a circle is 100π ft². What is the circumference, in feet? express your answer in terms of \piπ
Bond [772]

Answer:

20π ft

Step-by-step explanation:

To find the circumference of the circle given its area, first find its radius.

\textcolor{steelblue}{\boxed{\text{Area of circle =}\pi  {r}^{2} }}

Substitute given area into the formula:

100π= πr²

Divide both sides by π:

100= r²

Square root both sides:

r =  \sqrt{100}

r= 10 ft

\textcolor{steelblue}{\boxed{\text{Circumference of circle = }2\pi  {r}}}

Since we have found the value of the radius, we can substitute r= 10 into the formula above to find the circumference.

Circumference of circle

= 2(π)(10)

= 20π ft

8 0
2 years ago
The population distribution of SAT scores is normal with a mean of μ=500 and a standard deviation of SD=100. For example, what i
vitfil [10]

Answer:

0.02275

Step-by-step explanation:

We use the z score formula to solve for this

z-score is given as: z = (x-μ)/σ

where x is the raw score,

μ is the population mean

σ is the population standard deviation

In the above question:

mean of μ=500

a standard deviation of SD=100

raw score x = 700

Hence, z score = (700 - 500)/ 100

= 200/100

= 2

z score = 2

Using the z score table of normal distribution to find the Probability of z = 2

P( x = z)

= P(x = 700)

= P( z = 2)

= 0.97725

P(x>700) = 1 - P(x = 700)

= 1 - 0.97725

= 0.02275

Therefore, the probability of randomly selecting an individual from this population who has an SAT score greater than 700 is 0.02275

7 0
3 years ago
On average the number of drum sets sold in Michigan each year is 96,537, which is seven times the average number of drum sets so
Harman [31]

Answer:

13791

Step-by-step explanation:

Take 96,537 and divide by 7

6 0
4 years ago
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