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
horrorfan [7]
3 years ago
13

Can someone explain step by step how to do this and how to get the numbers please? HELP HELP HELP!!

Mathematics
1 answer:
Alexxandr [17]3 years ago
8 0
A = 113.1
so the formula for the area of a circle is
A = pi x r^2
-pi is 3.14(rounded)

-r stands for the radius of the circle which is half the diameter so for this circle your r or radius is 6 and the radius is just squared

so when you plug the numbers in the formula it is
A = 3.14 x 6^2(squared)

A = 3.14 x 36

A = 113.1

You might be interested in
A tank contains 250 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu
VashaNatasha [74]

Answer:

A(t)=250-210e^{-\frac{t}{50}}

Step-by-step explanation:

We are given that

Volume,V=250 L

Mass of salt=m=40 g

Brine containing 1 g per liter

Pumped into the tank at the rate=5 L/min

We have to find the number A(t) of grams of salt in the tank at time t.

Rate of change of salt in the tank

\frac{dA}{dt}=Rate in-Rate out

Rate in=5 L/min

Rate out=\frac{A}{250}\times 5=\frac{A}{50} L/min

\frac{dA}{dt}=5-\frac{A}{50}=\frac{250-A}{50}

\int \frac{50dA}{250-A}=\int dt

-50ln(250-A)=t+C

Using the formula

\int \frac{dx}{x}=ln x

A=40 and t=0

-50ln(250-40)=0+C

-50ln(210)=C

Substitute the value

-50ln(250-A)=t-50ln(210)

-50ln(250-A)+50ln(210)=t

50ln\frac{210}{250-A}=t

t=50ln\frac{210}{250-A}

\frac{t}{50}=ln\frac{210}{250-A}

\frac{210}{250-A}=e^{\frac{t}{50}

\frac{250-A}{210}=e^{-\frac{t}{50}}

250-A=210e^{-\frac{t}{50}}

A(t)=250-210e^{-\frac{t}{50}}

8 0
4 years ago
If the area of a square is 1 square meter, how many centimeters long is each side?
aev [14]

Answer:

100 centimeters

Step-by-step explanation:

Area of a square is side x side= s x s or s²

If s² = 1 square meter

s = √1 = 1 meter

Each side is 1 meter.  To convert to centimeters multiply by 100 since there are 100 centimeters in 1 meter.

Each side is 100 centimeters

7 0
4 years ago
Write the ratio two fifths<br> to 8 as a fraction in simplest form.<br><br> PLEASE HELP
charle [14.2K]

Answer:

the answer is b on oddesseyware

Step-by-step explanation:

7 0
4 years ago
Please help ASAP... another answer is D. Translation
STALIN [3.7K]

Answer:

B. Reflection

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The coordinates of the midpoint of AB are:
umka2103 [35]
The answer should be 
c) (-2,5) 

It is the only point that falls on the line and when you count the units from (-7,2) to (-2,5) it is 5 units and when you count the distance from (3,8) to (-2,5) you also get 5 units, proving that (-2,5) is in the middle of the line.
4 0
4 years ago
Read 2 more answers
Other questions:
  • 9+a=23 need to solve this problem​
    12·2 answers
  • Find the value of y​
    11·2 answers
  • Prove x = 8 if the m&lt;ADC = 54 degrees
    12·1 answer
  • What is the answer to 2 + 2​
    6·1 answer
  • 5. Solve the equation. Show your work. Check your answer.<br> 4y + 5 = – 31
    9·1 answer
  • Which number is the greatest -1.264,-5/4,-1.015,-0.480,-14/25,-13/8
    6·1 answer
  • Can you simplify 3(x+2) = 3x+6 in distributive property
    13·2 answers
  • Maritzas car has 16 gallons of gas in the tank.She uses 3/4 of the gas.How many agllons of gas does Maritza use?
    12·2 answers
  • What percent is the shaded portion of the entire diagram?<br><br><br> 9%<br> 40%<br> 45%<br> 90%
    7·2 answers
  • 2 of 10 students received A’s in science. What percent of the students received grades other than A’s?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!