7x3^(4x-1)+7=13 help me :) (use natural logarithms)

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

Yosef can eat 21 jamuns while rose can eat just 15 . complete the blank. yosef can eat % more jamuns than rose.

Given the sequence 7, 14, 28, 56, which expression shown would give the tenth term? a. 7^10 b. 7·2^10 c. 7·2^9