What is the limit $lim_{x \to 0} \frac{l n ( 1 + 3 x )}{x}$ ?

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What is the transpose of the matrix $A = (1340 - 2 5)$ ?
What is the area of the triangle with vertices $A (1, 0, 0)$ , $B (0, 2, 0)$ , and $C (0, 0, 3)$ in $R^{3}$ ?
What is the derivative of $f (x) = \frac{e ^{x}}{x + 1}$ at $x = 0$ ?
What are the dimensions of the rectangle of perimeter 40 that has maximum area?
What is the value of $\int_{0}^{1} (e^{x} + 2 x) d x$ ?
What is the angle between the line $r : \frac{x - 1}{1} = \frac{y}{0} = \frac{z + 1}{1}$ and the plane $π : y = 0$ ?