Round $2.7842$ to $2$ significant figures.

 

Round $0.305287$ to $3$ significant figures.

Round $49702$ to $2$ significant figures.

Round $0.007024$ to $2$ significant figures.

Use a calculator to do the calculation below. Round each answer to $3$ significant figures.

 $65÷8.7$

Use a calculator to do the calculation below. Round each answer to $3$ significant figures.

 $5.{31}^3$

Use a calculator to do the calculation below. Round each answer to $3$ significant figures.

 $\frac{\sqrt{8.42+3.81}}{5.9}$