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
Volgvan
3 years ago
5

Find the area of the circle.

Mathematics
1 answer:
melomori [17]3 years ago
8 0
Area of circle=pi x radius ^2,  if the line through the center of the circle goes from one end to the other, it is the diameter, so you need to divide it by 2 before you put it into the formula. If the line is only half way, then it is already the radius, so use that number in the formula.

2.  the line is half way only, so it is the radius=21. You can use it in the formula:
  a=3.14 x 21 ^2
  a=3.14x441
 a =1384.74

3. the line goes all the way to the other side of the circle, so it is the diameter=56. you need to divide it by 2 to get the radius: so 56/2=28=radius. Now us 28 in the formula:
3.14 x 28^2
a=3.14 x 784
a=2461.76.

just continue doing that for the rest of the problems. Hope this helps.
You might be interested in
"If 5 is decreased from double Joe's weight, the result is 230. What is Joe's weight?"<br> 30
Gala2k [10]

Answer:

117.5 or 235/2

Step-by-step explanation:

We can set up an equation for this problem:

Lets Joe's weight be x

then:

2x -5 = 230

therefore:

2x = 235

x = 117.5 or 235/2

3 0
3 years ago
What is the cross section shown below?
goldenfox [79]
<h3>Answer: Choice A) circle</h3>

Explanation:

Imagine that white rectangle as a blade that cuts the cylinder as the diagram shows. If you pull the top cylinder off and examine the bottom of that upper piece, then you'll see a circle forms. It's congruent to the circular face of the original cylinder. This is because the cutting plane is parallel to both base faces of the cylinder. Any sort of tilt will make an ellipse form. Keep in mind that any circle is an ellipse, but not vice versa.

Another example of a cross section: cut an orange along its center and notice that a circle (more or less) forms showing the inner part of the orange.

Yet another example of a cross section: Imagine an egyptian pyramid cut from the top most point on downward such that you vertically slice it in half. If you pull away one half, you should see a triangular cross section forms.

3 0
3 years ago
Read 2 more answers
Liz flips a coin 30 times. The coin lands heads up 21 times and tails up 9 times. Complete each
SSSSS [86.1K]

Answer:

Pr = 0.50

Step-by-step explanation:

Given

n = 30

H = 21

T = 9

See attachment for complete question

Required

P(H)

The question requires that we calculate the theoretical probability of landing on the head.

This means that, we have to ignore the given data, and we use the following

S =\{H,T\} --- sample space

n(S) = 2 --- sample size

n(H) = 1 --- occurrence of Head

So, the theoretical probability is:

Pr = n(H)/n(S)

Pr = 1/2

Pr = 0.50

8 0
3 years ago
What is 57/6 simplified?
ludmilkaskok [199]
Answer:
19/2
Step-by-step explanation :
U divide the numerator and the denominator by the same number which is 3
57 divided by 3 = 19
6 divid by 3 = 2
So the answer is 19/2
3 0
3 years ago
Read 2 more answers
Part A: Describe how you can decompose this shape into triangles. (2 points)
kvv77 [185]

Answer:

A: 6 triangles with height 10.4 inches each and base 12 inche

B: 62.4 square inches

C: 374.4 square inches

Step-by-step explanation:

Part A: You can form a triangle by connecting E to the top of the segment and connecting the top of the segment to D. Recreating this with each section will create 6 triangles with height 10.4 inches each and base 12 inches.

Part B: The area of a triangle is A = 1/2b*h. Substitute h = 10.4 and b = 12.

A = 1/2*10.4*12 = 62.4

Part C: There are 6 triangles each with area 62.4. So the area of the whole figure will be 6*62.4 = 374.4.

8 0
3 years ago
Other questions:
  • The volumes of two similar prisms are 891 cm3 and 33 cm3. The surface area of the larger prism is 153 cm2. What is the surface a
    10·1 answer
  • the sum of 2 consecutive integers is less than 55.the pair of integers sum are 26 and 27. true or false?
    9·1 answer
  • 120 is what percent of 200
    6·2 answers
  • Find the solution to this system: 5x-2y=-11 -2x+5y=17 Multiplying equation 2 by will create additive inverses for the x-coeffici
    9·1 answer
  • Solve for the variable in the following equation.<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7B8%7D%20%20%3D%2013" i
    14·1 answer
  • PLEASE HELP! This seems really hard and I tried many times to do it but I still cant understand...​
    8·2 answers
  • Petra bought a car she wrote the different expenses associated with it in this table. What are the total expenses for the car af
    10·2 answers
  • 3ab+4ab^3 I really need help please help meeeee!!!!
    12·1 answer
  • The process of completing the square
    9·1 answer
  • A distribution of 1000 test scores has a mean of u = 287. Following standardization, what is the standard deviation for this dis
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!