B, the first differences are not the same , that proves it is not linear. The second set of differences are the same this shows it is a quadratic function.
Answer: 61,000
Step-by-step explanation:
61,360 is nearest to 61,000 then too 62,000
If your solving for x, you need to isolate/get the variable "x" by itself in the inequality:
-24 ≤ 3x - 9 First add 9 on both sides
-24 + 9 ≤ 3x - 9 + 9
-15 ≤ 3x Then divide 3 on both sides to get "x" by itself

-5 ≤ x [or x ≥ -5 if you prefer "x" to be on the left side]
Length=x
Width=4x
4x•x=400 sq cm
x= 10 cm
4x= 40 cm
P=2•10cm+2•40 cm
=100 cm