A.6 <span>because a coefficient is the numerical constant quantity placed before and multiplying the variable in an algebraic expression. (eg 5x so the coeff is 5)</span><span />
The circumferince of the circle is 2πR ; The area of the circle is π; Then, 2πR = 704 ; R = 352 / π ; π = π × ( 352 / π )^2 = ( 352^2) / π = 123904 / π ≈ 39459.87 ≈ 39460 cm^2 ;