Help with 5 and 6, will PayyyPallll you money if correct

Answer:
Step-by-step explanation:
1 yard is 3 feet
[tex]1,500=4500\\900= 2700[/tex]
area in feet squared
[tex]A=4500*2700\\A=12150000[/tex]
Area in acres
[tex]A=1215000/43650\\A=278.35[/tex]
Cost
[tex]C=87000/278.35\\C=312.56[/tex]
Answer is B
6. answer is D