To determine which of the choices is lies on the line represented by the equation, 2x + 5y = 4, substitute the values of the abscissas to the x of the equation and solve for y. Evaluate if the y calculated is equal to the ordinate of the ordered pair. Calculations are shown below.
A. (7, -2) ; 2(7) + 5y = 4 ; y = -2 ; EQUAL B. (0,-1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL C. (0,1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL D. (3, -2) ; 2(-3) + 5y = 4 ; y = 2 ; NOT EQUAL
When you square the radius = 6×6= 36. Multiply 36×3×3.14=339.12. Using the formula, you then multiply 1/3×339.12=339.12/3= 113.04 in^3. Final answer is 113.04^3
