Which postulate proves these two triangles are congruent

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

Find the solution of each of the following.

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top