What is the 8th term of this geometric sequence 3 6 12 24

Asilkworm winds its cocoon out of one long silk fiber. to make silk thread, 3 to 10 of these silk fibers are unwound from their cocoons and combined into aa single thread with a typical length of 300 yards. choose a reasonable number of silk fibers in a thread write an equation to find the total length of the silk fibersused in 300 yards of the thread

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

Abank gives 6.5% interest per year. what is the growth factor b in this situation?