Answer:
$30769.23
Step-by-step explanation:
52
a-9=20
a=20+9
a=29
b-9>20
b>29
36 is the answer, hope this helps.
Check the picture below.
so the pyramid is really 4 triangular faces with a base of 6 and a height of 7, and a 6x6 square at the bottom.