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
sammy [17]
3 years ago
14

A tank can be filled by pipe A in 5 hours and by pipe B in 8 hours, each pump working on its own. When the tank is full and a dr

ainage hole is open, the water is drained in 20 hours. If initially the tank was empty and someone started the two pumps together but left the drainage hole open, how long does it take for the tank to be filled
Mathematics
2 answers:
dangina [55]3 years ago
8 0

Answer:

The answer is 3.6 hours. that is how long it takes for the tank to be filled

alina1380 [7]3 years ago
5 0

Answer:

Step-by-step explanation:

tank filled in 1 hour by pipe A=1/5

tank filled in 1 hour by pipe B=1/8

water drained out in 1 hour=1/20

tank filled in 1 hour by all three=1/5+1/8-1/20=(8+5-2)/40 =11/40 [L.C.M. of 5,8,20=40]

time taken to fill the tank=40/11=3 7/11 hours

You might be interested in
Find the fifth term in the sequence that is defined as follows a1=1. An=3an-1+2
faltersainse [42]

The fifth term in the sequence would be 161.

Step-by-step explanation:

We have to find the fifth term in the sequence an=3a(n-1)+2

Given that

a1 = 1  (that is the first term)

If we follow the formula, the value of every term depends on the value of immediate lower term. Therefore, the a2 can be calculated by putting 2 in place of n in above equation

a2=3a(2-1)+2

a2=3a1+2

a2=3(1)+2 as a1 = 1

a2=5

Similarly,

a3=3a(3-1)+2

a3=3a2+2

a3=3(5)+2 as a2 = 5

a3=17

and

a4=3a(4-1)+2

a4=3a3+2

a4=3(17)+2 as a3= 17

a4=53

and

a5=3a(5-1)+2

a5=3a4+2

a5=3(53)+2 as a4 = 53

a5=161

Therefore, the fifth term in the sequence would be 161.

Learn more:

The following links have more information about sequencing

brainly.com/question/7221312

Keywords: sequence, arithmetic series

#learnwithBrainly

6 0
4 years ago
Which set of integers is not a Pythagorean triple?
Leto [7]

Answer:

10,24,25

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Please help<br><br>is -18/6 an integer​
Nesterboy [21]

Answer:

No

Step-by-step explanation:

An integer by definition is a whole number that is not a fraction.

7 0
3 years ago
Given f(x)=3x-1 and g(x)=2x-3, for which value of x does g(x)=f(2)?
Mnenie [13.5K]
I believe the answer is 2
6 0
4 years ago
Your company is planning to air a number of television commercials during a television network's presentation of the an awards s
Sunny_sXe [5.5K]

This question is incomplete, the complete question is;

Your company is planning to air a number of television commercials during a television network's presentation of the an awards show. The network is charging your company $1.9 million per 30-second spot. Additional fixed costs (development and personnel costs) amount to $500,000, and the network has agreed to provide a discount of $160,000√x for x television spots.  

Required:

Write down the cost function C, marginal cost function C’, and average cost function

Answer:

- The  the cost function is 500,000 + 1,900,000x - 160,000√x

- the marginal cost function is 1,900,000 - (80000 /√x  )

- The  average cost function is 1,900,000 + [ 500,000 / x ] - [ 160,000 / √x ]

Step-by-step explanation:

Given the data in the question;

cost per spot = $1.9 million

Additional cost =  $500,000

discount = $160,000√x

 Let C(x) represent the cost ;

Cost x television spot = cost per spot × Number pf spots

Cost x television spot = $1.9 million × x

Cost x television spot = $1,900,000x

Now, the television set total cost will be;

C(x) = television cost + additional cost - discount  

C(x) = 500,000 + 1,900,000x - 160,000√x

Therefore, The  the cost function is 500,000 + 1,900,000x - 160,000√x

Marginal Cost Function;

Cost function C(x) = 500,000 + 1,900,000x - 160,000√x

we differentiate with respect to x

C'(x) = d/dx( 500,000 + 1,900,000x - 160,000√x )

= d/dx( 500000 ) + 1,900,000d/dx -160,000 d/d( √x )

= 0+ 1,900,000(1) -160,000( 1 / 2√x )

= 1,900,000 - (160,000 / 2√x  )

= 1,900,000 - (80000 /√x  )

Therefore, the marginal cost function is 1,900,000 - (80000 /√x  )

Average cost function;

Average cost function = C(x) / x

we substitute

Average cost function = [500,000 + 1,900,000x - 160,000√x] / x

=  [500,000 / x ] + [1,900,000x / x ]  - [ 160,000√x / x ]

=  [ 500,000 / x ] + 1,900,000 - [ 160,000√x / x ]

=  1,900,000 + [ 500,000 / x ] - [ 160,000 / √x ]

Therefore, The average cost function is 1,900,000 + [ 500,000 / x ] - [ 160,000 / √x ]

5 0
4 years ago
Other questions:
  • The monthly starting salaries of students who receive an MBA degree have a population standard deviation of $120. What sample si
    14·1 answer
  • Classify the figure in as many ways as possible.
    13·1 answer
  • If R represents the third vertex in the triangle and R is located in the third quadrant, what is the length of PR?
    10·2 answers
  • Find the difference. Write the answer in simplest terms. 2/3- 3/9
    9·2 answers
  • 12-inch board is to be cut into three pieces so that the second piece is twice as long as the first piece and the third piece is
    12·1 answer
  • Can someone help me please <br> Brainiest answer to whoever is first
    13·1 answer
  • Can someone help me real quick
    14·1 answer
  • What is 8:6 simplified
    5·2 answers
  • An investor buys shares of stock for $24 per share. Three years later the value has increased by 15%. What is the new value of e
    15·1 answer
  • Helppppppppppppppppp ASAP
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!