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
Xelga [282]
3 years ago
8

An aquifer holds 146,000 cubic feet of water. Water exits through a well at a steady rate of 500 cubic feet per day, and the aqu

ifer is replenished at a constant rate of x cubic feet per day. If the water in the aquifer is used up in a year (365 days), what is the value of x? Ignore evaporation and other losses.
Mathematics
2 answers:
m_a_m_a [10]3 years ago
8 0

Answer:

The value of x = 100  ft^3/ day

Step-by-step explanation:

We need to look at what amount of water comes in and what amount of water leaves

What comes in:  x ft^3/ day

What leaves : 500x ft^3/ day

We start with 146 000 ft^3

Water in tank = what we start with + what comes in - what leaves

water in tank = 146000 + x*d - 500*d  where d is the number of days

After 365 days , the tank has 0 ft^3 of water

0  = 146000 + x*365 - 500*365

Multiply

0 = 146000 + 365x - 182500

Combine like terms

0 = -36500+365x

Add 36500 to each side

36500 = 36500-36500+365x

36500 = 365x

Divide by 365

36500/365 = 365x/365

100=x

The value of x = 100


kramer3 years ago
4 0

First, find the amount of water in cubic feet that the well removes in one year:

500 ft3 per day × 365 days per year = 182,500 ft3 per year.

More water exits the aquifer in a year than it can hold at any given time. So, we know that some water enters the aquifer to make up the difference.

182,500 ft3 lost to well – 146,000 ft3 stored in aquifer = 36,500 ft3 added per year.

One year is the same as 365 days, so

Therefore, x = 100 cubic feet of water per day.

You might be interested in
Julia is evaluating the expression 40-6W + 2 When W= 4. What should be Julia's first step in order to evaluate the expression co
adoni [48]

Answer:

A. multiply 6 by 4

Step-by-step explanation:

40-6W + 2

Let w = 4

Substitute 4 for w

40 -6(4) +2

40 - 24 +2

3 0
3 years ago
Long division<br> 3x+1/6x^6+5x^5+2x^4-9x^3+7x^2-10x+2
inna [77]
(6 x^{6}+5x^{5}+2x^{4}-9x^{3}+7x^{2}-10x+2) / (3x+1)

We divide first number from first parenthesis with first number from second parenthesis. Then the resulting number we multiply by all numbers in second parenthesis and substract from first parenthesis.

6 x^{6}/3x = 2 x^{5} \\  \\ 6 x^{6}+5x^{5}+2x^{4}-9x^{3}+7x^{2}-10x+2 - 6 x^{6} -2 x^{5} = 3x^{5}+2x^{4}-9x^{3}+7x^{2}-10x+2\\

We repeat previous steps until we run out of numbers:
3x^{5}/3x=x^{4} \\ \\ 3x^{5}+2x^{4}-9x^{3}+7x^{2}-10x+2-3x^{5}-x^{4}= \\ \\ x^{4}-9x^{3}+7x^{2}-10x+2 \\ \\ \\ x^{4}/3x= \frac{1}{3} x^{3} \\ \\ x^{4}-9x^{3}+7x^{2}-10x+2-x^{4}- \frac{1}{3} x^{3}= \\ \\ - \frac{28}{3} x^{3}+7x^{2}-10x+2 \\ \\ \\ - \frac{28}{3} x^{3}/3x= - \frac{28}{9} x^{2} \\ \\ - \frac{28}{3} x^{3}+7x^{2}-10x+2+ \frac{28}{3} x^{3}+ \frac{28}{9} x^{2} = \\ \\ \frac{91}{9} x^{2}-10x+2
\frac{91}{9} x^{2}/3x=\frac{91}{27} x \\ \\ \frac{91}{9} x^{2}-10x+2-\frac{91}{9} x^{2}-\frac{91}{27} x= \\ \\ -\frac{361}{27} x+2 \\ \\ \\ -\frac{361}{27} x/3x=-\frac{361}{81} \\ \\ -\frac{361}{27} x+2+\frac{361}{27}x+\frac{361}{27}= \\ \\ \frac{415}{27}

We are left with a number that has no x inside. This is remainder.
The final solution is sum of all these solutions and remainder:
(2 x^{5}+x^{4}+\frac{1}{3} x^{3} - \frac{28}{9} x^{2} +\frac{91}{27} x)+(-\frac{361}{81} )
6 0
3 years ago
Z + 81 = 9z -7 help solve
Ede4ka [16]
8z-7=81
8z=88
z=11
Have a good day!
:0)
5 0
3 years ago
Read 2 more answers
It took Michala 4 hours to sew 9 scarfs. How many scarfs could she make in 24 hours
aksik [14]
<h2>4 hours → 9 scarfs</h2><h2>8 hours → 18 scarfs</h2><h2>12 hours → 27 scarfs</h2><h2>16 hours → 36 scarfs</h2><h2>20 hours → 45 scarfs</h2><h2><u>24 hours → 54 scarfs</u></h2><h2><u /></h2><h3>Therefore, Michala can sew 54 scarfs in 1 day.</h3>
3 0
3 years ago
Convert y=9 from rectangular to polar form
Crazy boy [7]

Answer:

r = 9/sin Ф or r = 9 csc Ф

Step-by-step explanation:

The polar form is represented as:

x = r cos Ф and

y = r sin Ф

We are given:

y = 9

Putting value in y = r sin Ф

9 = r sin Ф

=> r = 9/sin Ф

1/sin Ф = csc Ф

or, r = 9 csc Ф

5 0
3 years ago
Read 2 more answers
Other questions:
  • A square has a side of length of 12 centimeters. Which of he following is closest to the length of a diagonal of the square?
    5·1 answer
  • Logs are stacked in a pile with 74 logs on the bottom row and 6 on the top row. Each row has four more logs than the row above i
    11·1 answer
  • mrs brown has 1/3 yd of blue denim and 1/2 yd of black demin. how many purses can be made using denim as the main fabric
    14·1 answer
  • Select the correct answer.
    6·2 answers
  • Mr.Gonzales showed student part of a prime factorization of 90. One factor is missing . What number completes this prime factori
    9·1 answer
  • Write 6,219 in expanded form.​
    15·1 answer
  • A lawn-mowing company is trying to grow its business. It had 26 clients when they started its business and wants to increase by
    6·2 answers
  • Given f(x) = -2x +12, find f(-3).​
    10·1 answer
  • At a restaurant a manger recorded the sales for one of his servers named
    12·1 answer
  • :p help............::
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!