Answer:
Part A = D
Part B = 5 and 50
Step-by-step explanation:
Part A:
area = 5*4x = 20x
so, [tex]100 \leq 20x \leq 1000[/tex]
Part B:
to leave it only by x, you divide both sides by 20
100/20 = 5, 1000/20 = 50
which [tex]5\leq x\leq 50[/tex]
