Please show all the work as to how you got the answer. I really need the help and how to show the work. Thank you for your help.
4+4=8 10+10=20 20+20=40
12) A=LW in this case: A=10*4 A=40 ft^2 (40 square feet) 13) Since when rounding to the nearest 100, it rounds to 400, the number must be greater than or equal to 350... n≥350 When rounded to nearest 10, it rounds to 350, so n<355.... 350≤n<355 Only C., 352 can satisfy the inequality.