I was a combat engineer in the US Army during the 1990's.
Yes, mines come in a variety of sizes. The size is determined by the purpose and the amount of explosives required to do the job.
On the small end, 2"-3" diameter anti-personnel mines are fairly common. The US M14 Anti-Personnel mine is 2.2" (56mm) in diameter and 1.5" (40 mm) tall.
At the high end, Anti-Tank mines are sized to damage large vehicles. They have high pressure triggers to try and minimize the risk that they will go off from something other than a vehicle. 12" to 18" in diameter is not an uncommon size.
A yard is three feet, and a foot is twelve inches. Multiply twelve by three and you get forty-eight. Half of three is one and a half, so that would be eighteen inches. Add eighteen and forty-eight is sixty-six. One yard is forty-eight inches, and one and a half feet is eighteen inches. Thus, a one and a half yard is sixty-six inches.
Three inches.
If its diameter is 14 then its area is: pi*72 = 153.938 square inches to three decimal places
Given the information in the question, there is no need for any inequality. the flat surface can be described as an equality. Outer diameter = one and a half inches => outer radius = 0.75 inches. Inner diameter = three fourths inches => inner radius = 0.375 inches. Area = pi*(0.752 - 0.3752) square inches. So one possible set of inequalities is 0 < area < 1,000,000,000 sq inches!
There are: pi*42 = 50.265 square inches rounded to three decimal places
none.
Circumference of the circle: pi*3.7 = 11.624 inches rounded up to three decimal places
The waist measurement of a size eighteen dress is ninety-three centimeters or 36.5 inches. The bust size of a size 18 dress is 109 centimeters or forty-three inches.
There are: pi*5.75^2 = 103.869 square inches rounded to three decimal places
To find the diameter of a circle with a 36-inch circumference, you can use the formula C = πd, where C is the circumference, π is pi (approximately 3.14159), and d is the diameter. Plugging in the values, we get 36 = 3.14159 * d. Solving for d, we find that the diameter is approximately 11.46 inches.
The circumference is: 36*pi = 113.097 inches rounded to three decimal places
1/3 of eighteen would be 6. Just divide eighteen by three.