Asked by joon

The radius of a circle is 75 mm. What is the approximate area of the circle? Write your answer to the tenths place. Use 3.14 for π.
__ mm²
Answered by joon
Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 12? Use 3.14 for π and express your answer to the hundredths place.

75.36
452.16
37.68
18.84
Answered by joon
Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 450?(1 point) Responses C≈3.14⋅450÷2 upper C approximately equals 3.14 times 450 divided by 2 C≈3.14⋅150 upper C approximately equals 3.14 times 150 C≈2⋅3.14⋅450 upper C approximately equals 2 times 3.14 times 450 C≈3.14⋅4502
Answered by joon
Which formula correctly describes the proportional relationship between the circumference of a circle and the diameter?(1 point) Responses C=πd upper C equals Start Fraction pi over d End Fraction π=dC pi equals Start Fraction d over upper C A=πr2 upper A equals pi r squared Cd=π
Answered by joon
Use the correct formula to find the area of a circle if the diameter is 21 mi. Round to the nearest hundredths place. Use 3.14 for π .(1 point) Responses 65.94 mi.2 65.94 mi squared 346.19 mi.2 346.19 mi squared 1,384.74 mi.2 1,384.74 mi squared 131.88 mi.2
Answered by joon
Which of the following is the correct formula for finding the area of a circle?(1 point) Responses A=πr2 upper A equals pi r squared A=2πr upper A equals 2 pi r A=C2÷4πA=πd2 upper A equals upper C squared divided by 4 pi upper A equals pi d squared A=πd
Answered by GPT 3.5
The area of a circle is calculated using the formula A = πr^2, where r is the radius of the circle.

Given that the radius of the circle is 75 mm, we can substitute this value into the formula:

A = 3.14 * 75^2
A = 3.14 * 5625
A ≈ 17671.25 mm²

Therefore, the approximate area of the circle is 17671.3 mm².
Answered by GPT 3.5
The formula to find the circumference of a circle is C = 2πr, where r is the radius of the circle.

Given that the radius of the circle is 12, we can substitute this value into the formula:

C = 2 * 3.14 * 12
C = 75.36

Therefore, the correct answer is 75.36.
Answered by GPT 3.5
The correct formula to find the circumference of a circle with a radius of 450 is:

C = 2πr

C = 2 * 3.14 * 450
C = 2 * 3.14 * 450
C = 2 * 3.14 * 450
C = 2 * 3.14 * 450
C = 2826

Therefore, the correct formula is C ≈ 2 * 3.14 * 450.
Answered by GPT 3.5
The correct formula that describes the proportional relationship between the circumference of a circle and the diameter is:

C = πd

This formula states that the circumference (C) of a circle is equal to pi (π) times the diameter (d).
Answered by GPT 3.5
Given that the diameter of the circle is 21 miles, we first need to find the radius, which is half of the diameter:

Radius (r) = Diameter / 2
r = 21 / 2
r = 10.5 miles

To find the area of the circle, we use the formula A = πr^2:

A = 3.14 * (10.5)^2
A = 3.14 * 110.25
A ≈ 346.185

Rounding to the nearest hundredths place, the area of the circle is 346.19 mi².

Therefore, the correct answer is 346.19 mi².
Answered by GPT 3.5
The correct formula for finding the area of a circle is:

A = πr^2

This formula states that the area (A) of a circle is equal to pi (π) multiplied by the square of the radius (r).