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
LekaFEV [45]
3 years ago
5

The area of a circle is 78.5 cm² . Find the lenght of the radius of a circle . Use π = 3.14

Mathematics
2 answers:
Tpy6a [65]3 years ago
6 0

Answer:

5cm  = r

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

78.5 = 3.14 r^2

Divide each side by 3.14

78.5/ 3.14 = r^2

25 = r^2

Take the square root of each side

sqrt(25) = sqrt(r^2)

5 = r

love history [14]3 years ago
5 0

Answer:

The Radius= 5

Step-by-step explanation:

First since you divide the area by 3.14,  which should get you 25. Then your supposed to find the square root of 25 OR in other terms find 2 numbers when multiplied equal 25. That is 5.

To check your answer:

To check if this is correct simply find the area by using the radius.

The formula is radius multiplied by itself then multiplied by pi/3.14.

5x5=25, 25x3.14=78.5

There you go! 78.5 is the area!

You might be interested in
When Emily woke up, the temperature was 8 degrees F. By noon, the temperature had risen by 3 degrees F. It rose another 6 degree
Vadim26 [7]
The temperature when Emily went to bed was -4°F.
Step-by-step explanation:
8°F + 3°F = 11°F (noon)
The temperature had risen by 3°F by noon. This means to add 3.
noon + 6°F = the day's high temperature
11°F + 6°F = 17°F (the day's high temperature)
The temperature rose another 6°F in the afternoon. This means add 6 to the temperature from noon.
high temperature - 21°F = temperature at bed
17°F - 21°F = -4°F
The temperature dropped by 21°F when Emily went to bed. This means to subtract 21 from the day's high temperature.
Risen, rose, and increase mean addition.
Decrease, dropped, and decline mean subtraction.
Hope this helps :)
4 0
3 years ago
Analyze the diagram below and complete the instructions that follow.
Mnenie [13.5K]

Answer:

  D.  157°

Step-by-step explanation:

∠EFB and ∠AFB form a linear pair, so are supplementary.

∠EFB = 180° - ∠AFB = 180° -23°

∠EFB = 157°

5 0
3 years ago
Find answer to picture problem
Wewaii [24]

Answer:

Can you add the picture please???

Step-by-step explanation:

3 0
3 years ago
Solving proportions<br> Solve for k.<br> 10<br> 3<br> k<br> 9<br> k
dem82 [27]

Answer:

k = 30

Step-by-step explanation:

Given

\frac{10}{3} = \frac{k}{9} ( cross- multiply )

3k = 90 ( divide both sides by 3 )

k = 30

8 0
3 years ago
Read 2 more answers
Not including myself and 1 my factors are 2,3,4,6,8,12,16,24,32,48 what number am i?
Zarrin [17]
Your 5 the answer is 5 hoped youu enjoied the answer
4 0
3 years ago
Other questions:
  • A water tank hols 540 galloms but is leaking at a rate of 4 gallons per week a second water tank holds 720 gallons but is leakin
    9·1 answer
  • -x + 2 = 3/4x + 29/18
    14·1 answer
  • Ronnie wants to buy a computer table that measures 10 feet by 17 feet. The cost of the table is 16.00 per square feet. How much
    8·2 answers
  • A number is a palindrome
    15·1 answer
  • Is -4 greater,less than or equal to +4 ?​
    6·1 answer
  • Find the volume of a right circular cone that has a height of 8.6 in and a base with a radius of 13.7 in. Round your answer to t
    10·1 answer
  • Find the value of x​
    6·1 answer
  • How to solve a table graph using this coordinates (0x,-7y) (4x,9y) (5x,13y) (-10x,-47y<br> )
    13·1 answer
  • HELP! THIS IS DUE TODAY, AND I WILL MARK BRAINLEST!!!!
    8·1 answer
  • Why did Matt get upset when his teacher called him average?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!