No because 15 times pi is an irrational number
It the radius is r then the area is pi*r*r - which is pi times a rational number. pi is an irrational number, so the multiple of pi and a rational number is irrational.
No, it is not.
Any multiple of or addition to or subtraction from PI is an irrational number. PI divided by PI is 1, a rational number. So is PI times 0 = 0
No; since pi is irrational if you multiply it by a rational number it is still irrational
3.14 is a rational number pi is not. pi is not 3.14
3 times pi is an irrational number because it can't be expressed as a fraction
No because the value of pi as regards to a circle is an irrational number
No, it is not.
3.1415 is rational (as are all other terminating decimals). Note that these are some of the first few digits of pi (3.14159…, which really should be rounded to 3.1416 not 5); pi is an irrational number. Approximations of pi are generally rational numbers.
No, and nor is negative 5 pi.
I assume you mean 2 times pi. Since pi is irrational, 2 pi is also irrational.
Any number times pi is irrational.
Well, (pi) x (1/pi) = 1 .
e^pi ~ 23.14069.............., not rational
(pi) itself is an irrational number. The only multiples of it that can be rational are (pi) x (a rational number/pi) .
No because it can't be expessed as a fraction
If you mean 0.3 times pi then it is an irrational number
Pi is not rational it is irrational because it does not stop or repeat
Natural numbers are whole numbers from 1 upwards, so 25 and 5 are whole numbers. Since you didn't use commas, I can't tell if the last string of numbers is 12 times pi (not a natural number) or the numbers 1, 2, and pi (1 and 2 are natural numbers). Integers are whole numbers, so 25, -17, -12, 5, square root of 9 are all integers. (1 and 2 are as well, if they aren't asking for 12 times pi). Rational numbers can be written as a fraction, so all of the numbers listed except pi are rational. The square root of 2 would be irrational, but since the square root of 9 is 3, it's rational. Pi is an irrational number.
Pi X 5 = 15.7. Pi is equal to 3.14 then you multiply it by 5.
No 10*pi is not a rational number because it can't be expressed as a fraction
Circumference is 2 times pi times radius, so the circumference of this circle is 2 times pi times 5, or 10 times pi. If a decimal answer is needed, pi is approximately 3.14, so C=31.4
Yes because it termninates, unlike pi
Pi is irrational.