Simplify the following ；giving your answers in index form

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

What is the area of the shaded sector?