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]
2 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]2 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]2 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
Find the values of x and y.
kotykmax [81]

Answer:

y=9 and x=18

Step-by-step explanation:

You know that y+3=12 so 12-3=9

You know that x-3=15 so 15+3=18

6 0
3 years ago
HELP ME AND PLEASE HURRY
Damm [24]
The answer is sometimes true
8 0
2 years ago
Determine which of the following sets of ordered pairs represents a function
Illusion [34]

Answer:

B.

Step-by-step explanation:

Every answer besides B. has an input that repeats. A function contains inputs that have exactly one output. This means x values cannot have more than one y value.

8 0
3 years ago
Write expression as a sine or cosine of an angle.<br>cos 94° cos 18° + sin 94° sin 18° ​
MArishka [77]
<h3>Answer:  cos(76)</h3>

=========================================================

Explanation:

The original expression is of the pattern cos cos + sin sin. This pattern matches the second identity in the hint. Specifically, we'll say the following:

cos(A - B) = cos(A)cos(B) + sin(A)sin(B)

cos(A)cos(B) + sin(A)sin(B) = cos(A - B)

cos(94)cos(18) + sin(94)sin(18) = cos(94 - 18)

cos(94)cos(18) + sin(94)sin(18) = cos(76)

----------

We can verify this by use of a calculator. Make sure your calculator is in degree mode.

  • cos(94)cos(18) + sin(94)sin(18) = 0.24192
  • cos(76) = 0.24192

Both expressions give the same decimal approximation, so this helps confirm the two expressions are equal. You could also use the idea that if x = y, then x-y = 0. Through this method, you'll subtract the left and right hand sides and you should get (very close to) zero.

6 0
2 years ago
Suppose you like to keep a jar of change on your desk. Currently, the jar contains the following: 1717 Pennies 1010 Dimes 1919 N
jasenka [17]

Answer:

25.50

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • Please help me with this math problem
    5·1 answer
  • the denominator of a fraction is 3 less than the numerator. If 5 is added to the numerator and denominator, the result is 5/6. F
    10·1 answer
  • Need help with math!!
    11·1 answer
  • Help me please I don't understand plz give me th answer
    13·2 answers
  • Jake tossed a paper cup 50 times and recorded how it landed. The table shows the results:
    13·1 answer
  • Find the perimeter AND area of the parallelogram ABCD. Show all work
    5·1 answer
  • It takes 14 electricians 18 days to wire a new housing subdivision. How many days would it take 24 electricians to do the same j
    15·2 answers
  • The yearly cost in dollars, y, at a video game arcade based on total game tokens purchased, x, is y = x + 60 for a member and y
    9·1 answer
  • 24 - x = -16 SHOW ALL WORK
    15·1 answer
  • James is trying to determine the height of a building, so he uses a street sign as a reference. The street sign is 6 feet tall a
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!