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
. Equilibrium: If the number of persons who attend the club meeting this week is X, then the number of people who will attend ne
Artyom0805 [142]

Answer:

100

Step-by-step explanation:

In economics, for a firm to earn optimum profits, it is important that it achieves a long run equilibrium. We can transfer the same to the case here that for the club to achieve optimum attendance, it must achieve long- run equilibrium attendance.

The condition for Long Run Equilibrium is that:

Club meeting attendance this week = Club meeting attendance next week

X = 80 + 0.20X

X - 0.20X = 80

X = 80/0.8

X = 100.

The long- run equilibrium attendance for this club is 100.

5 0
4 years ago
How many proper subsets does the set T = {i, c, j, e} have?
Gala2k [10]
Number of proper subsets = 2^number of elements- 1
= 2^n - 1
No of elements = 4
2^4-1 = 16-1 = 15
5 0
3 years ago
I’ll give points + brainalist please help!!
sattari [20]

Step-by-step explanation:

x+6+90+3x-4=180 - - > x=22

So, the angle is 22+6=28°

3 0
3 years ago
0.456x10 to the 3rd power
SOVA2 [1]

Answer: 94.818816


Step-by-step explanation: The first step in this problem is multiplication. Therefore, you should multiply 0.456 by 10. The product you get is 4.56. However, we aren't done with this problem yet! The last step in this problem is calculating the third power. That means we need to do 4.56^3 or you can multiply 4.56 by itself three times: 4.56 x 4.56 x 4.56. After multiplying, the answer you get should be 94.818816.

I hoped this helped, and good luck with any future problems!


4 0
3 years ago
ustin wants to use 188 ft of fencing to fence off the greatest possible rectangular area for a garden. What dimensions should he
Tema [17]

Answer:

I would say that it should be 48 ft long and 46 ft wide, the area would be 2208 square feet

Step-by-step explanation:

I will try my best to answer this.

I would start by dividing 188 by 4

this gives you a 47*47 square

if it needs to be a rectangle I would then make the sides 48, 48, 46, and 46

48*46 would be the dimensions

the area would be 2208 square feet

5 0
4 years ago
Other questions:
  • X/-2=4, X/3+13=13, Z/2+2=4 plz show ur work and explain how u did it
    5·1 answer
  • Jim is 24 and earns 62,000 a year. He wishes to invest for his daughters college education, which is 18 years away.
    15·1 answer
  • What is 492.3069 rounded to nearest thousandth
    10·2 answers
  • The product of two numbers is 20. If one of the numbers is 5/14, what is the other number
    9·1 answer
  • What is the area that she paints
    15·2 answers
  • The money used in jordan is called dinar ,The exchange rate is $3 to 2 dinar how many dollars would you recieve if you exchanged
    10·1 answer
  • How can you find the Mean Absolute Deviation HELP AFAP!!!!!
    12·1 answer
  • 6 7/8 + 5 3/4 = what
    15·1 answer
  • Please help me<br> I don’t know this
    14·1 answer
  • What is the solution set of {x | x &lt; -3} ∩ {x | x &gt; 5}?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!