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
Kisachek [45]
3 years ago
6

Rearrange the formula A = \pi r ^ ( 2) for r

Mathematics
1 answer:
tatyana61 [14]3 years ago
3 0
Consider re-writing this formula as "A = pi*r^2."  The backslash symbol "\" is unnecessary.

If A = pi*r^2, and we wish to solve for r, then divide both sides by pi:

A/pi = r^2

Taking the square root of both sides,   sqrt(A/pi) = r (r must be positive in this situation).
You might be interested in
Plzzzz need answers​
earnstyle [38]

Answer:

1. (x,y)→(y,-x)

2. (x,y)→(-y,x)

3. (x,y)→(-x,-y)

Step-by-step explanation:

1. Rotation 90° clockwise (or 270° counterclockwise) about the origin changes x into y and y into -x, so it has the rule

(x,y)→(y,-x)

2.  Rotation 90° counterclockwise (or 270° clockwise) about the origin changes x into -y and y into x, so it has the rule

(x,y)→(-y,x)

3.  Rotation 180° clockwise  about the origin changes x into y and y into -x, so it has the rule

(x,y)→(-x,-y)

Here you can apply rotation by 90° clockwise twice, so

(x,y)→(-y,x)→(-x,-y)

3 0
3 years ago
Solve for a <br> 9a² = 16a<br> College Intermediate Algebra
Fed [463]

We want to solve 9a² = 16a for a.

Because the a is on both sides, a good strategy is to get all the a terms on one side and set it equal to zero. Then we apply the Zero Product Property (if the product is zero then so are its pieces and Factoring.

9a² = 16a

9a² - 16a = 0                <-----subtract 16a from both sides

a (9a - 16) = 0               <-----factor the common a on the left side

a = 0   OR   9a - 16 =0   <----apply Zero Product Property

Since a = 0 is already solved we work on the other equation.

9a - 16 = 0

9a = 16                        <----------- add 16 to both sides

a = 16/9                       <----------- divide both sides by 9


Thus a = 0 or a = 16/9

7 0
3 years ago
4.44+77079.9704= who know the answer
Delvig [45]
4.44+77079.9704=77084.4104
7 0
3 years ago
Please help fast will give 5 stars and thank you
aniked [119]

Answer:

(1,-1)

Step-by-step explanation:

Hope it helps

7 0
3 years ago
Read 2 more answers
IF U ANSWER CORRECTLY I MARK U BRAINLIEST
Andreyy89

Answer:

B and C

Step-by-step explanation:

B: Normally 3/7 would be bigger, but since it's negative -2/7 is greater than -3/7.

C: 0 is greater than anything negative.

5 0
3 years ago
Read 2 more answers
Other questions:
  • PLZZ HELP I NEED AN EXPERT ANSWER
    11·1 answer
  • The absolute ______ of 2 is 2.<br> 1.) absolute value <br> 2.)sign<br> 3.)opposite
    14·2 answers
  • Which side lengths form a right triangle?
    12·2 answers
  • A. The GCF of 18 and 21 is__
    6·1 answer
  • The diagram shows a semi circle inside a rectangle of length 140m. the semi circle touches the rectangle at P, Q and R. Calculat
    14·1 answer
  • Five times what number plus 10 equals 20?
    8·2 answers
  • Please help me find the answer
    14·1 answer
  • Determine the missing number in each sequence
    12·1 answer
  • ! 100 ! Pts... .. .. .. ...
    11·2 answers
  • Find the value of x plssssssss
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!