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
melamori03 [73]
3 years ago
13

It costs 19.20 for a pack of 8 padlocks.Find the unit price in dollars per padlock.If necessary, round your answer to the neares

t cent.
Mathematics
1 answer:
nadya68 [22]3 years ago
8 0
The answer is $2.4. Hopefully this helped.
You might be interested in
What is 160% of 5 rounded to the nearest hundredth
faltersainse [42]

Answer:

8

Step-by-step explanation:

8 0
4 years ago
What is 1/2 % of 200
Katarina [22]
One half of 200 is 100 because 200 divided by 2 is 100

P.S: Please give me brainiest answer
4 0
3 years ago
Read 2 more answers
What is the expression in factored form? x2 + 14x + 48
scZoUnD [109]
(x+6)(x+8) = 0 
x = -6 or x = -8

I'm just wondering, does the equation happen to be  2x^2 + 14x + 48? That would make more sense with the answer I got.

7 0
3 years ago
Read 2 more answers
How does y vary with x
Ugo [173]

Answer:  y varies directly as x ", " y varies proportionally as x ", or " y is directly proportional to x . ") This means that as x increases, y increases and as x decreases, y decreases—and that the ratio between them always stays the same.

Step-by-step explanation:

4 0
3 years ago
A swimming pool with a volume of 30,000 liters originally contains water that is 0.01% chlorine (i.e. it contains 0.1 mL of chlo
SpyIntel [72]

Answer:

R_{in}=0.2\dfrac{mL}{min}

C(t)=\dfrac{A(t)}{30000}

R_{out}= \dfrac{A(t)}{1500} \dfrac{mL}{min}

A(t)=300+2700e^{-\dfrac{t}{1500}},$  A(0)=3000

Step-by-step explanation:

The volume of the swimming pool = 30,000 liters

(a) Amount of chlorine initially in the tank.

It originally contains water that is 0.01% chlorine.

0.01% of 30000=3000 mL of chlorine per liter

A(0)= 3000 mL of chlorine per liter

(b) Rate at which the chlorine is entering the pool.

City water containing 0.001%(0.01 mL of chlorine per liter) chlorine is pumped into the pool at a rate of 20 liters/min.

R_{in}=(concentration of chlorine in inflow)(input rate of the water)

=(0.01\dfrac{mL}{liter}) (20\dfrac{liter}{min})\\R_{in}=0.2\dfrac{mL}{min}

(c) Concentration of chlorine in the pool at time t

Volume of the pool =30,000 Liter

Concentration, C(t)= \dfrac{Amount}{Volume}\\C(t)=\dfrac{A(t)}{30000}

(d) Rate at which the chlorine is leaving the pool

R_{out}=(concentration of chlorine in outflow)(output rate of the water)

= (\dfrac{A(t)}{30000})(20\dfrac{liter}{min})\\R_{out}= \dfrac{A(t)}{1500} \dfrac{mL}{min}

(e) Differential equation representing the rate at which the amount of sugar in the tank is changing at time t.

\dfrac{dA}{dt}=R_{in}-R_{out}\\\dfrac{dA}{dt}=0.2- \dfrac{A(t)}{1500}

We then solve the resulting differential equation by separation of variables.

\dfrac{dA}{dt}+\dfrac{A}{1500}=0.2\\$The integrating factor: e^{\int \frac{1}{1500}dt} =e^{\frac{t}{1500}}\\$Multiplying by the integrating factor all through\\\dfrac{dA}{dt}e^{\frac{t}{1500}}+\dfrac{A}{1500}e^{\frac{t}{1500}}=0.2e^{\frac{t}{1500}}\\(Ae^{\frac{t}{1500}})'=0.2e^{\frac{t}{1500}}

Taking the integral of both sides

\int(Ae^{\frac{t}{1500}})'=\int 0.2e^{\frac{t}{1500}} dt\\Ae^{\frac{t}{1500}}=0.2*1500e^{\frac{t}{1500}}+C, $(C a constant of integration)\\Ae^{\frac{t}{1500}}=300e^{\frac{t}{1500}}+C\\$Divide all through by e^{\frac{t}{1500}}\\A(t)=300+Ce^{-\frac{t}{1500}}

Recall that when t=0, A(t)=3000 (our initial condition)

3000=300+Ce^{0}\\C=2700\\$Therefore:\\A(t)=300+2700e^{-\dfrac{t}{1500}}

3 0
3 years ago
Other questions:
  • The sum of two numbers is 72. one number is 4 less than the other number. what are the two numbers?
    10·1 answer
  • Which statement about the value of the 5 in 775 and 89,507 is true?
    8·1 answer
  • I’m supposed to solve this by eliminating the x variable
    9·1 answer
  • The smaller triangle was dilated to form the larger triangle. What is the value of x? A smaller triangle has side lengths of 5,
    15·2 answers
  • One month Kevin rented 2 movies and 6 video games for a total of $38. The next month he
    12·1 answer
  • What is c=(s+b/4) solve s?
    14·1 answer
  • The bottom of a 13-foot straight ladder is set into the ground 2.5 feet away from a wall. When the top of the ladder is leaned a
    6·1 answer
  • The notes say that the Continental Congress created a committee to write a plan for government. Based on the notes, whom did the
    10·1 answer
  • Which expressions have exactly two factors? Choose ALL that apply.
    11·1 answer
  • Is y= 2x (linear or nonlinear)
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!