Levi deposits $800 in a bank account. The simple interest rate is 2.75% per year. Find the interest earned in 9 months​

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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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?