[填空题]
Given that z=$\frac{10sina}{3x+y}$,where α=30°, x=6 and y=46.
1.Find the exact value of z. z= .
2.Write your answer to part (a)
2.1.correct to 2 decimal places;
The number= .
2.2.correct to 3 significant figures;
The number= .
2.3.in the form a×10$^k$ , where 1≤a<10 and k∈Z.
The number= ×10$^{-2}$.
