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
Vesna [10]
3 years ago
14

a circle has an area of 81 3.14 units . what is the diameter in terms of 3.14a circle has an area of 81 Pi square units what is

the diameter of the circle
Mathematics
2 answers:
poizon [28]3 years ago
8 0

Answer:

18 units

Step-by-step explanation:

\pi r^2=81\pi

Solve for r:

\pi r^2=81\pi \\r^2=81\\r=9

Knowing diameter is 2*r, we can apply the formula to find diameter

d=2*r\\d=2*9\\d=18

Sunny_sXe [5.5K]3 years ago
4 0
You have posted 2 separate questions here.  Please, next time, separate them with a blank line:

<span>A circle has an area of 81 3.14 units . what is the diameter in terms of 3.14?

I'd prefer you write this as 
"</span><span>A circle has an area of 81 pi units . what is the diameter in terms of pi?

Area of a circle = A = pi*r^2.  Note that r= diameter / 2.  Here, the area is 81 pi square units, or 9^2 * pi square units, which means that the radius is 9 units.  The diameter is then 2(9 units) = 18 units.


Your second question, separated from the first, is:

"</span><span>a circle has an area of 81 Pi square units what is the diameter of the circle?"
</span><span>
Use the following formula or formulas:  d = 2*r; A = pi*r^2; A = pi*(d/2)^2.  Find r first, and then find d.

</span>
You might be interested in
Help me please thanks (:
Vlad [161]

Answer:

The first, second, and fourth answer choices are correct.

Step-by-step explanation:

-2.5 is less than -2.

14 is equal to 14.

10 is greater than -12.


I hope this helped! :-)

4 0
3 years ago
What is the mean absolute deviation <br><br> 3,5,8,1,4
erastovalidia [21]

Answer:

the mean is 4.2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Jon has $45.00. He plans to spend 4/5 of his money on sports equipment. How much will he spend
stich3 [128]
He will spend 80% of his money
5 0
3 years ago
The sum of two consecutive integers is -207
Maru [420]

Answer:

They would be -104 and -103.

Step-by-step explanation:

-103 + (-104)

= -103 - 104

= -207.

3 0
3 years ago
Determine whether the relation describe c as a function of w.
Delicious77 [7]

Answer:

Function:

c = f(w) = 0.49, 0 < w ≤ 1

            = 0.70,  1 < w ≤ 2

            = 0.91, 2 < w ≤ 3

Step-by-step explanation:

Yes, the relation described can be interpreted as a function.

Here, c is the cost of a mail letter. c depends upon w, which is the weights of the mail letter.

As described in the question, the relation can be expressed as a function.

c can be expressed as a function of w in the following manner:

c(cost of mail) = f(w), where w is the independent variable and c is the dependent variable

c = f(w) = 0.49, 0 < w ≤ 1

            = 0.70,  1 < w ≤ 2

            = 0.91, 2 < w ≤ 3

where, c is in dollars and w is in ounces.

5 0
3 years ago
Other questions:
  • A painter mixes 6 parts red paint and 8 parts yellow to make dark orange paint. Which equation can the painter use to calculate
    8·1 answer
  • PPPPPPPLLLLLLLLZZZZZZ HELP I AM GIVING BRAINLIEST AND 50 POINT
    14·2 answers
  • Consider The Graph shown?
    11·1 answer
  • What is the solution to the inequality below?
    15·1 answer
  • I’ll give brainliest!!
    14·1 answer
  • Which is the graph of the equation y=-3/2x+6
    7·1 answer
  • Help please!! ASAP
    11·2 answers
  • -
    8·1 answer
  • There are two conditions under which we can assume that the sample means follow a normal distribution. What are they
    8·1 answer
  • Which choice is equivalent to the expression below?<br> 5x√2-3√2+x√2
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!