Mathematics Middle School

Find the area of a circle with a diameter of 56 millimeters. Round your answer to the nearest hundredth.

area: about ???
mm2

Answers

Answer 1

9514 1404 393

Answer:

  2463.01 mm²

  2461.76 mm² if you use 3.14 for π

Step-by-step explanation:

The formula for the area of a circle is ...

  A = πr²

where r is the radius, half the diameter.

For a diameter of 56 mm, the radius is 28 mm. Using that in the formula gives an area of ...

  A = π(28 mm)² = 784π mm²

For an appropriate value of π, the area is ...

  784π mm² = 2463.00864... mm² ≈ 2463.01 mm²

For 3.14 as the value of π, the area is ...

  784(3.14) mm² = 2461.76 mm²

_____

Comment on pi

Quite often these problems expect you to use 3.14 for pi. The required answer has 6 significant digits, so the use of a 3-digit value for pi is not appropriate. Rather, the value used should be 3.141493 or even more accurate.

Related Questions

Solve for X:
x/-4 ≥ -25

A) X ≥ 100
B) X ≥ -100
C) X ≤ 100
D) X ≤ -100

Answers

Answer:

c

Step-by-step explanation:

the greater than sign turns into a less than sign when you cross multiply a negative number

and -4 times -25 is +100

whoever said b is braindead

Answer:

A) x ≥ 100

Step-by-step explanation:

x/-4 ≥ -25

x-4 x-4 (Multiply by -4 on both sides)

x ≥ 100

Diedre bought a car in California. The price of the car was $32,000. California has an 8% sales tax. How much did Diedre pay for the car, including sales tax?

Answers

The answer is 2560

I hope am not late

I need help and if you do I will give you 10 points

Answers

Can’t really understand what it say bro...sorry but maybe u should ask the question again with a clearer picture...I’m sorry

Please help this is my last day to do this Ill give brainly
The area of a square garden is 84 square feet. Which of the following values is the BEST estimate of the side length of the garden?
A. 7 feet
B. 9 feet
C. 11 feet
D. 21 feet

Answers

Answer:

B. 9 feet

Step-by-step explanation:

Westin Trading normally nets $6 million per month. The table shows the variance from the average for five months. Sales Above/Below Average (Millions) April May June July Aug. –2.5 Negative 2 and one-half 3.1 –1.6 2 and two-thirds Which comparison is true? Use the number line to help. A number line going from negative 6 to positive 6 in increments of 1. June July May = August

Answers

Answer:

The answer is (A)

Step-by-step explanation:

(brainliest pls)

Answer:

A

Step-by-step explanation:

Help please I will give brainleist

Answers

Answer:

The answer is 80%

is there a transformation that maps shape I onto shape II? explain your answer

Answers

rotation of a 90 degree angle clock wise

Answer:

reflection and a rotation

Step-by-step explanation:

I'm not able to use a video or gif to explain so here an image from MS Paint.

I'm also unaware of the answer provided to pick and cancel out to get the right on so i just hope my answer is right for but if anything good luck and hope you have a great day.

Select the graph that matches the equation. y= -x

Answers

the second graph matches the equation y=-x. hope this helped! :)
the second graph matches

Want a challenge, well take a look at these pics and see if you can answer them. :D
Good luck :]

Answers

What level math courses are these if you don’t mind me asking? Enjoy the answers :’)

Part 1A)

Let Y be the number of tickets sold.

Y = 2.5X

Part 1B)

0=0
2=5
4=10
6=15

Part 1C)

You have to do the graph independently.

Part 1D)

There were 10 tickets sold and $25 were made.

Part 2A)

Holi earns more, 0.50¢ / hour

Part 2B)

Let X be the hours worked
Let Y be the total pay

Y = 8.75X
Welp someone already answered and I have to answer questions so I can get someone to help me with my hw but good luck bro/ ma’am :)

What value of Y makes the equation true ?

Answers

Answer:

y = -5/2 or -2.5

Step-by-step explanation:

3y + 4 = -y - 6

add y to both sides

4y + 4 = -6

subtract 4 from both sides

4y + 4 - 4 = - 6 - 4

4y = -6 - 4

4y = -10

divide both sides by 4

4y/4 = -10/4

y = -10/4

y = -5/2 or -2.5

17+50+13+4x
x=
Missing Angle=

Answers

Answer:

4(x+20)

Step-by-step explanation:

hope i helped

Answer:

x=25

Step-by-step explanation:

17+50=67

67+13=80

180-80=100

100/4=25

(Hope this is helpful and correct.)

please please help, thanks!

Answers

Answer:120 is the area to the nearest unit

Step-by-step explanation:

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