1 D 4 his x (6) \( 5 \longdiv { 7 0 7 0 } + x \) (b) In how many years nill the initial sum deposited hare doubled? (Round your answer to the nearest yeac) years 5+5 1 D 4 his x (6) \( 5 \longdiv { 7 0 7 0 } + x \) (b) In how many years nill the initial sum deposited hare doubled? (Round your answer to the nearest yeac) years 5+5