1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
antiseptic1488 [7]
3 years ago
7

Onepipefillsastoragepoolin20hours.Asecondpipefillsthesamepoolin15hours.Whenathirdpumpisaddedandallthreeareusedtofillthepool,itta

kesonly6hours.Findhowlongittakesthethirdpipetodothejob(by itself)
Mathematics
1 answer:
Tanzania [10]3 years ago
7 0

Answer:

yes

Step-by-step explanation:

You might be interested in
Question 1
r-ruslan [8.4K]
The perimeter of the a and BC is 14 unitsBecause if you add all of the sides together you get 14 and I need points
6 0
3 years ago
The school play is selling tickets for their new show. Adult tickets cost $10 while child tickets cost 5$. Their goal is to earn
DaniilM [7]
If an adult ticket costs $10, and a chlid's ticket is $5, then one possible combination of tickets could be 30 adult tickets and 10 children tickets. Another could be to sell 15 adult tickets and 25 children tickets.
3 0
3 years ago
A study was designed to investigate the effects of two​ variables, (1) A​ student's level of mathematical anxiety and​ (2) teach
Mashcka [7]

Answer:

P(X>400)=P(\frac{X-\mu}{\sigma}>\frac{400-\mu}{\sigma})=P(Z>\frac{400-440}{20})=P(z>-2)

And we can find this probability using the complement rule:

P(z>-2)=1-P(z

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(z>-2)=1-P(z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(440,20)  

Where \mu=440 and \sigma=20

We are interested on this probability

P(X>440)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>400)=P(\frac{X-\mu}{\sigma}>\frac{400-\mu}{\sigma})=P(Z>\frac{400-440}{20})=P(z>-2)

And we can find this probability using the complement rule:

P(z>-2)=1-P(z

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(z>-2)=1-P(z

6 0
4 years ago
Evaluate 1.1.075 + 21.67 <br> 3.15<br> ​
o-na [289]

Answer:

√ 96

log

(100 )

3 ^5 / 3

Step-by-step explanation:

6 0
3 years ago
the vaal dam can store 2536 million m3 of water when full. However it was 65 4% full on the 30 January 2020 how many litres of w
PIT_PIT [208]

Answer:

Current water in dam = 1,676.202 million m³ (Approx.)

Step-by-step explanation:

Given:

Storage capacity of dam = 2,536 million m³

Current water level = 65.4%

Find:

Current water in dam

Computation:

Current water in dam = Storage capacity of dam x Current water level

Current water in dam = 2,563 x 65.4%

Current water in dam = 1,676.202 million m³ (Approx.)

5 0
3 years ago
Other questions:
  • Could someone please help?
    12·2 answers
  • 132 packages of clay, 6 clay sticks in each package, 3 sticks go to each student. How many students are able make projects out c
    10·1 answer
  • Which angles are corresponding angles check all that apply
    15·2 answers
  • Six and four fifths divided by three and two ninths
    11·1 answer
  • Algebra 2 work, it an EXAM PLEASEEE HELP i’ll even cash app you $10!!!! please just please
    12·1 answer
  • (26.6.1) Which of the following is an example of perpendicular lines?
    15·1 answer
  • An investor has an account with stock from two different companies. Last year, her stock in Company A was worth $5990 and her st
    7·2 answers
  • Can someone help me please algebras hard
    13·1 answer
  • Determine the x- and y- intercepts for the graph defined by the given equation.
    15·2 answers
  • Given kite RSTU. Please I need help ASAP.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!