7-x4-2x can you help me

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

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

2,10,-50 next two numbers geometric sequence