Me find the arc of the semicircle found in the picture

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Use the expression below.–4b + 8c + 12 – 8b – 2c + 6part asimplify the expression. enter your answers in the boxes. b + c + part bfactor the simplified expression using the gcf. a. 2(–2b + c + 3) b. 3(–2b + c + 3) c. 4(–2b + c + 3) d. 6(–2b + c + 3)part cwhat is the value of the expression when b = 2 and c = –3? enter your answer in the box.