Circumference of a circle is found with the equation
C = 2 × pi × r
where r is the radius. So for your problem...
C = 2 × 3.14 × 4
C = 25.12 meters
0.9285714 has 7 digits after the decimal sign. So it is equivalent to the fraction with a numerator 9285714 and a denominator 10000000

Result:
The decimal number 0.9285714 is equivalent to the fraction
4642857 / 5000000

The answer is b. Hope this was helpful
The area of a triangle is 1/2*base*height so 1/2*10*8 which is equal to 40in²
the answer to your question is C