Can yall help me with math please and thank you

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

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

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?