The Brainliest Answer!
To grow carrots:
Early carrot varieties take around 12 weeks to mature and main crop carrot varieties are ready in around 16 weeks.
How deep?
Sow your seeds about a quarter inch deep and 2 inches apart, in rows spaced at least 10 inches apart; carrots do well in double or triple rows. Thin seedlings to 4 to 6 inches apart, depending on the variety's mature size. 
To grow carrots:

3 3 3