Hello! I need help pretty please! Thank you!

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Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Which ordered pair is a solution of the equation? 2x+3y=10