The answer is 21.98
14pi = 43.982297150257105338477007365913
You can only express this exactly by leaving it as is: 22/7 times pi. If you want a decimal approximation, use an approximation of pi, for example. 3.1416, and do the calculation on a calculator.
______ 9*22/7 = 28.285714
the same as pi squared, which is 9.86960440109
Well, first of all, it's not pie, it's Pi. Pi times 10 equals 31.4159265897932384626433832795. You just slide the decimal point one digit to the right.
22/7=pi (roughly) 7 times pi is 21.99115 pi is 3.1415926535898 etc
28
14pi = 43.982297150257105338477007365913
The circumference of a circle is diameter times pi or pi times the radius doubled. Pi is equivalent to 22/7. Multiply 21 by 3.14 which gives you 65.999999... 7
The formula is d x pi. Therefore, the answer would be 7 times pi.
Multiply 2 times pi (3.14 OR 22/7) times the radius 2(pi)r
You can only express this exactly by leaving it as is: 22/7 times pi. If you want a decimal approximation, use an approximation of pi, for example. 3.1416, and do the calculation on a calculator.
Just multiply the diameter times pi. Pi is approximately 3.1416.
Volume is 4/3 pi*radius*radius*radius 3.14 times 7 times 7 times 7 times 4 divided by 3= volume 1436.2666666 Surface area is 4 * pi * radius * radius 4 times 3.14 times 7 times 7=surface area 615.44
Two times the radius times pi equals the circumference of a circle. 2 x 3.5 = 7 7 x pi = 7 x 3.1416 = 21.99 or about 22
Times it by 2, then times it by pi. 3.14 if no calcultor (22/7) or just press the shift key then pi on your calculator
pi times 49, or if you round pi to 3.14 it's 153.86