Calculator Competition

In the following questions, you should correct your answer to 3 significant figures. For example: 1.23456≈1.23, 0.058956≈0.0590.

• I understand the instruction!

• Don't choose this.

 $\sqrt{5.5^2+6.5^2}$  

 $\frac{\sqrt{4}}{15+\sqrt{3}}$  

 $\sin^218\degree$  

 $\frac{2}{11}+\frac{13}{37}-\frac{17}{151}$  

 $\frac{4.2^2+3.2^2}{8.2^2-1.1^2}$  

 $\frac{1}{\sin25\degree}+\frac{2}{\cos25\degree}$  

 $\frac{3+5\sin14\degree}{7-6\tan34\degree}$  

 $200\div\left(\frac{1}{\tan40\degree}+\frac{1}{\tan65\degree}\right)$  

 $3.256\times10^4-8.756\times10^3$