The population of Whoville has been decreasing at a rate of 1.9% per year since Dr. Seuss passed away in 1991. If the population was 7593 in 2021, what was the population in 1991?

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.

If f(x)=x^2- 4 and g(x)=x^2 plus 2 x, (c) (f-/3) = ? (simplify your answer.)