Hello if you're able to answer this question for me please do and provide work, Thank you

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

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project