The function f ( r ) = π r 2 determines the area of a circle in cm2, A , in terms of the radius of the circle in cm, r . Define a function g that determines the radius of a circle in cm, r , in terms of the area of the cirlce in cm2, A .

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?