Idid all the others, but i can't recognize the pattern here (number 5)

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

Wrote and expression for the difference of p and 4

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?