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What is the diameter of a circle whose circumference is 314?
The diameter of a circle whose circumference is 314 is about 1 (99.95).
What is the square feet of 50'x50'?
Multiply 50 times 50 = 2500 square feet (ft2).
What is the radius of a circle if its area is 314?
9.9975
What is 3.14 x 4?
Don't get cared by the decimal, it's just a point. It means: divide by 10^n where n is the number of digits after the decimal. So in this case, 3.14 means 314 / 10^2 = 314 / 100 so you are actually doing this 314/100 x 4 = 314 x 1/100 x 4. Multiplication is commutative so you might as well do 4 x 314, then divide by 100. So you should get 1256 / 100. To divide by 100, recall what decimal means, it's simply 12.56 :D
Square root of 2500?
Just by looking at 2500, we can break it into two factors: 2500 = 25 x 100. Next, we take the square root of each term: sqrt(2500) = sqrt(25) x sqrt(100). Then, we simplify: sqrt(2500) = 5 x 10 = 50.
