a circular coin has radius of 8.2 what is the circumference rounded to the nearest tenth? please show work
Circumference
= 2πr
= 2*3.14159*8.2 (mm, I suppose)
= 51.522 mm
= 51.5 mm (rounded to the nearest 1/10th)
To calculate the circumference of a circle, you can use the formula:
Circumference = 2 * π * radius
Given that the radius is 8.2, we can substitute this value into the formula:
Circumference = 2 * π * 8.2
Now, let's calculate the circumference using the value of π as approximately 3.14:
Circumference = 2 * 3.14 * 8.2
Circumference = 51.536
Rounding this to the nearest tenth, we get:
Circumference ≈ 51.5
Therefore, the circumference of the circular coin, rounded to the nearest tenth, is 51.5.
To find the circumference of a circular coin, you can use the formula:
Circumference = 2 * π * radius
where π (pi) is a mathematical constant approximately equal to 3.14159.
Given that the radius of the coin is 8.2, we can substitute this value into the formula:
Circumference = 2 * π * 8.2
Now, let's calculate the circumference:
Circumference = 2 * 3.14159 * 8.2
= 51.796496
To round the circumference to the nearest tenth, we consider the digit in the hundredths place—9 in this case. Since 9 is greater than or equal to 5, we round the digit in the tenths place up. Therefore, the rounded circumference is:
Circumference ≈ 51.8
So, the circumference of the coin, rounded to the nearest tenth, is 51.8.