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
djverab [1.8K]
3 years ago
12

A tank can be filled by one pump in 50 minutes and by another pump in 60 minutes. A third pump can drain the tank in 75 minutes.

If all 3 pumps go into operation, how long will it take to fill the tank? help pls
Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0
It sure take a hours to pump in the tank
You might be interested in
The slope of a line is -1/2 what is the slope of a line that is parallel to it?
Lynna [10]
Parallel lines have the exact same slope ( or else they would eventually run into each other). So the answer is -1/2 is the slope.
5 0
3 years ago
Consider a left-tailed test, where the p-value is found to be 0.10. If the sample size n for this test is 49, then the t statist
tigry1 [53]

Answer:

df=n-1=49-1=48  

We know that the p value is 0.1, and since is a left tailed test would be given by:

p_v = P(t_{48} < t_{calculated})=0.1

And we can find the calculated value using excel or the t table.

If we use the following excel code we got: "=T.INV(0.1,48)"

And the calculated value is t_{calculated}=-1.29944

Step-by-step explanation:

State the null and alternative hypotheses to be tested  

We need to conduct a hypothesis in order to determine if the true mean is lower than specified valu \mu_o, the system of hypothesis would be:  

Null hypothesis:\mu \geq \mu_o  

Alternative hypothesis:\mu < \mu_o  

Compute the test statistic  

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

We can find the degrees of freedom for this test given by:

df=n-1=49-1=48  

We know that the p value is 0.1, and since is a left tailed test would be given by:

p_v = P(t_{48} < t_{calculated})=0.1

And we can find the calculated value using excel or the t table.

If we use the following excel code we got: "=T.INV(0.1,48)"

And the calculated value is t_{calculated}=-1.29944

3 0
2 years ago
Solve the inequality.−8≤2/5(k−2)<br><br> The / is not a division sign.
Dvinal [7]

Answer: x is grater or equal to -18

Inter el notation

[-18,oo)

Step-by-step explanation:

7 0
3 years ago
Answer this for brainliest answer image below
ololo11 [35]

Answer:

no mode ,    6       ,   6.24

Step-by-step explanation:

4 0
2 years ago
The GCF of 18 and 30 is ____.
hammer [34]

The GCF of 18 and 30 is 6

4 0
3 years ago
Read 2 more answers
Other questions:
  • Solve the inequality.<br><br> 4x + 1 &lt; 8x - 3 &lt; 4x + 5
    12·1 answer
  • Tell me what a origin is
    7·2 answers
  • It says divide 8•10 with an exponent of 5 over 2•10 with an exponent of 2
    13·1 answer
  • An essay contains 549 words. To the nearest hundred, how many words are in the essay?
    15·2 answers
  • Where do you use percents in everyday life?​
    6·1 answer
  • It take 23 minutes for 6 people to paint 6 walls.How many minutes does it take 9 people to paint 9 walls
    15·1 answer
  • The manager at a grocery store took a survey to determine the price of milk at 10 other stores in the area. The prices are
    10·1 answer
  • What is the volume of a hemisphere with a radius of 4.3cm rounded to the nearest tenth of a cubic centimeter
    7·1 answer
  • Solve: 70 x 103^3.<br><br> A 7,000<br> B 700,000<br> C 700<br> D 70,000
    15·2 answers
  • A coach ordered 1,565 flying discs for field day. The order is shipped in 5 boxes, with the same number of flying discs in each
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!