How do you round 2.8497 * 10^3 and 349.69 to 3 significant figures?

When I have inserted [what I thought was the correct answers] ie; 350.0 and 2.85, I was told it was incorrect.

Find the state income tax deducted: gross pay of $978, state income tax 5%

Find the solution set of this equation. y^2-11y=0 separate the two values with a comma.

Find the range of the following data set. 14.5.3.12.13 11 001 1

Three numbers between - 0.55 and 0.54

What is the preimter and area of a rectangle that is 30 inchs long and 39 inchs wide

Aubrey's dinner cost / $85$85. She tips the waitstaff 30/%30% for excellent service.

Tony had a certain number of stamps that were each worth $0.15. He misplaced 7 stamps. He found that the total value of his stamp collection was now $5.55.

The figure below shows a rope that circles the Earth. The radius of the Earth is 6371 kilometers. Assuming the rope makes a perfect circle, what is the length of this rope? Give your answer in terms of pi.

Thomas ran a mile in 8 minutes at this rate how many minutes did it take them to run 3/4 of a mile

Which expression is equivalent to (6n - 5) - (2n - 3) ? (A) 8n - 8 (B) 8n - 2 (C) 4n - 8 (D) 4n - 2