Liam is using the fermi process to estimate the number of standard sheets of u. s. writing paper that would need to be stacked on top of one another to reach the top of washington monument .
mason knows that a standard sheet of writing paper is approximately 0.004 in. thick and the washington monument is 555 ft tall. how many sheets of paper are needed

The answer is 1.66×10⁶ sheets of paper.

Monument is tall 555 ft. If 1 ft is 12 inches, than monument is tall 555 ft × 12 inches which is 6,660 inches.
Writing paper is approximately 0.004 inches thick.
The question is how many sheets of paper are needed for 6,660 inches tall monument:
6,660 ÷ 0.004 = 1,665,000 = 1.66 × 1,000,000 = 1.66 × 10⁶ sheets of paper.