squares & cubes. & square roots / cube roots.

Which is the best approximation for 

 $\sqrt{52}$  ?

• 6.5

• 7.2

• 7.8

• 8.2

Which is the best approximation for 

 $-\sqrt{24}$  ?

• -5.1

• -4.8

• -4.5

• 4.5

• 4.8

Which is the best approximation for 

 $\sqrt{172}$  ?

• 14.1 

• 12.5 

• 13.5 

• 13.1

• 12.9 

Select all true statements. 

•  $\pm\sqrt{81}=\ 9\ \&\ -9\$  

•  $-\sqrt{81}=-9$  

•  $\sqrt{-81}=-9$  

•  $\sqrt[3]{-8}​=-2$  

•  $\sqrt[3]{8}​=-2\ \&\ 2\$  

 $5\sqrt{49}+\sqrt{25}$  

Evaluate.

(a)  

 $\sqrt[3]{1}$  

• 1

• 1 and -1 

• 3 

• -1

• not possible >:-( 

 $\sqrt[3]{-1}$  

• 1

• 1 and -1 

• 3 

• -1

• not possible >:-( 

 $13^2$  

Evaluate

(a)  

 $4^2$  

Evaluate

(a)  

 $4^3$  

Evaluate

(a)