Answer:
270 centimeters squared
Step-by-step explanation:
A = H x W / 2
A = 18 x 30
A = 270
90 - 53.45 = 36.55
36.55 / 7.31 = 5 pounds of coffee
The decimal representation of any number is a linear combination of powers of 10. In other words, given a number like 123.456, we can expand it as

for any
, so the above is the same as

Similarly, we can write

Now it's a question of reducing the fraction as much as possible. We have
so

The answer would be D: 35,000