Ask question

Ask question

All categories

3 years ago

7

Find the circumference and area of a circle with a diameter of 22 inches. Leave your answers in terms of pi.

2 answers:

Cerrena [4.2K]3 years ago

5 0

Answer: d. C = 22π ; A = 121π

Step-by-step explanation:

Circumference of a circle with diameter d is given by :-

$C=\pi d$

Given: Diameter of circle = 22 inches

Therefore, the circumference of circle is given by :-

$C=\pi (22)=22\pi$

Area of circle: $A=\pi r^2$ , where r is radius of circle.

Since diameter = 22 inches, then radius = 11 inches [Half of diameter]

Now, Area of circle: $A=\pi (11)^2=121\pi$

astra-53 [7]3 years ago

4 0

The circumference formula is
C=Diameter x π=22 x π, the area formula is A=<span>π x R²
or R=</span><span>D/2=22/2=11

the answer is </span><span>d. C = 22π; A = 121π</span>

You might be interested in

One round of golf is 18. A hole in one happens once in every 3708 rounds of golf. How many holes of golf are played for every ho

lisabon 2012 [21]

18 x 3708 = 66744. That is thr answer

5 0

3 years ago

Write the equation of the circle below to complete the square. Also determine the area of the circle.

diamong [38]

Answer: $(x-7)^2+(y+2)^2=11^2$ ; $A=121\pi$

Step-by-step explanation:

I have never done a problem like this, so this is my first time attempting it.

The standard form for the equation of a circle is:

$(x-a)^2+(y-b)^2=r^2$

Begin by grouping the 'x' terms and 'y' terms:

$(x^2-14x)+(y^2+4y-68)=0$

Complete the square for the second polynomial:

$(\frac{b}{2} )^2=(\frac{4}{2} )^2=4$

$(x^2-14x)+(y^2+4y+4-4-68)=0$

$(x^2-14x)+(y^2+4y+4)-4-68=0$

$(x^2-14x)+(y^2+4y+4)-72=0$

$(x^2-14x)+(y+2)^2-72=0$

Do the exact same process with the other polynomial:

$(x^2-14x-72)+(y+2)^2=0$

Complete the square:

$(\frac{14}{2} )^2=49$

$(x^2-14x+49-49-72)+(y+2)^2=0$

$(x^2-14x+49)-49-72+(y+2)^2=0$

$(x^2-14x+49)-121+(y+2)^2=0$

$(x-7)^2-121+(y+2)^2=0$

Bring the 121 to the other side to get:

$(x-7)^2+(y+2)^2=121$

$(x-7)^2+(y+2)^2=11^2$

The above expression is the equation of our circle in standard form. It is centered at the coordinates (7, -2) and has a radius of 11 units. The area of a circle if given by:

$A=\pi r^2=121\pi$

8 0

1 year ago

ANSWER AND EXPLAIN PLEASE ILL MARK BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!

rusak2 [61]

Answer:

hiii 7272<>*~_+89×[0<×<×*×

4 0

2 years ago

Alexus is ordering a large pizza for lunch. She has $15 dollars in all. A large pizza costs $9 and

exis [7]

Step-by-step explanation:

It would be

9+6 because 0.50 is a dollar so if u multiply by 6 and add the 9 the equation would be 9+6.......

don't forget get to rate me thx:)

4 0

3 years ago

tekilochka [14]

Answer:

I think around 15°c

Step-by-step explanation:

PLEASE accept me in brainly

8 0

3 years ago