By rounding to one significant figure, estimate the answer to this question: 798 divided by 8 times 41 so I know it's 800 divided by 10=80 and 41 turns to 40 so it's 80x40 but no matter what I type in it's the wrong answer :/ just wanna make sure

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