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
Ksenya-84 [330]
3 years ago
7

What is the area of a circle whose radius is 4 cm?

Mathematics
2 answers:
kozerog [31]3 years ago
7 0
Heellllloooooo! :D

Let's start off with some basics.... remember that the formula for the area of a circle is  **** A = πr² ****     π approximately equal to 3.14

Now let's substitute in the radius that is given in for r...

<span>A = πr²
</span>A = (3.14)(4)²
A = (3.14)(16)
<u>A = 50.24 cm²</u><u />        <----- This is your answer! ^__^


Hope this helps! :D

<u>Please vote me for Brainliest if there is a second answer!</u>
MaRussiya [10]3 years ago
6 0
Well first, we must remember the formula for the area of a circle.
The formula for the area of a circle is:
PiR^2, or Pi • R^2.
Basically this means 3.14 (Pi) • R • R (Radius).
We have our radius, 4, so we can plug in our numbers to solve.
3.14 • 4 • 4 is our formula, so let's solve.
4 • 4 = 16.
16 • 3.14 = 50.24.

Remember when we solve for the area, we use units squared (units^2).

Your answer is 50.24 cm^2.

I hope this helps!
You might be interested in
a rabbit can run 35 miles per hour. a fox run can run 21 miles in half an hour.which animal is faster,and by how much
lord [1]

Answer:

the rabbit by 14 miles per hour

Step-by-step explanation:

The rabbit because if you subtract 35 from 21 it gives you 14

6 0
4 years ago
Read 2 more answers
Helpppppppppp<br> Urgenttttt<br> Pleaseeeee!
Alika [10]

Answer:

The first set is a set of linear equations.

The way to figure this out is pretty easy. If you want to see it visually, go search up desmos graphing calculator and put in these equations.

A linear equation is a function that has a constant slope, meaning that the rate it increases or decreases will never change. The first one is a set of linear equations because it is 2 equations with constant slopes, meaning that the slopes will never change no matter what y and x are.

The second set is not, because while the first equation is linear, the second is an inequality. While it is a straight line, it doesn't count as a linear equation.

The third set, both equations have exponents on the x, which means that the slope will change depending on x. This means that both of these are not linear equations.

The only set that is a linear set is the one that has only linear equations.

3 0
2 years ago
If m∠A = 56°, m∠B = 60°, and c = 8, what is the measure of side length b?
Alekssandra [29.7K]

Using the law of sines:

\frac{b}{sin(B)}=\frac{c}{sin(C)}

Solve for b:

\begin{gathered} b=\frac{c\cdot sin(B)}{sin(C)} \\ so: \\ b=\frac{8\cdot sin(60)}{sin(64)} \\ b\approx7.708 \end{gathered}

Answer:

7.708

5 0
1 year ago
Lines k and l are parallel. When lines k and l are cut by the transversals below, an isosceles triangle is formed.
Slav-nsk [51]
The angle to the left of angle 1 is 70, so angle 1 is equal to 180 - 70 - 70 which is 40,
5 0
3 years ago
Read 2 more answers
Using the given points, determine the slope. (0, 32) and (100, 212)
Lerok [7]

Slope = (y2 - y1)/(x2 - x1)

Slope = (212 - 32)/(100 - 0)

Slope = 180 / 100

Slope = 18/10

Slope = 9/5

Answer

D. slope = 9/5



4 0
3 years ago
Other questions:
  • Are my answers correct? All serious answers will be greatly appreciated!​
    11·1 answer
  • Find the <br> slope of 7y-x=14
    13·2 answers
  • Find the x plz help
    8·1 answer
  • How do i write 1.67 in words
    9·2 answers
  • The product of 6 and the sum of 3 times a number n and 5
    8·1 answer
  • Show that {(1,1,0),(1,0,1),(0,1,1)} is linearly independent subset of r^3
    13·1 answer
  • A graph has a slope of -2 and a y-intercept of 4. Fill in the equation below using slope-intercept form. y= blank x+ blank
    6·1 answer
  • Aileen drives 208 miles in 4 hours. What is her speed in miles per hour? (label with "miles per hour")
    11·1 answer
  • Help ASAP please
    7·1 answer
  • Micaela and Chelsea each improved their yards by planting rose bushes and ivy. They bought their supplies
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!