how do I solve #4 w/o using L'Hospitals or the product rule? Please show steps thank you

(1) The function f(x) = v3x -9 is continuous over the set a) (-00, 9) b) (3, 00 ) c) (-00, 00 ) d) [3, 00) e) none of the above (2) The limit lim 1+3 is 1 +- 1 a) -3 b) 1 c) undefined d) 2 e) none of the above (3) The limit lim 12 + 4 is a) 0 b) 13 C) 4 d) oo e) none of the above (4) Find the value of g(0) such that the function g(t) 3 sin(2t) - is continuous at t = 0. cos(4t) a) 0 b) 1 d) ? e) none of the above (5) The limit of the rational function h(t) = 21 - 12 3(3 + 5 when t -> co is a) COIN b )- c) 0 1 d) - e) none of the above