Week 35: Unit 2 Part (1)

The population of Argentina is  $3.164\times10^7$  . Its area is  $2.8\ \times10^6$  square kilometres. Work out the average number of people per square kilometre in Argentina

•  $1.13\ people\ per\ km^2$  
  

•  $11.3\ peope\ per\ km^2$  
  

•  $0.09\ km^2\ per\ people$  
  

•  $0.09\ people\ per\ km^2$  
  

Work out $50 - $23.46

• $27.54

• $26.4

• $26

• $26.54

Calculate $\frac{37^3+13^3}{37\ +\ 13}$ 

• 1057

• 1067

• 1000

• 1070

Work out $\sqrt{7.1^3+2.9^3}$ , write the answer to three significant figures 

• 19.5

• 19.6

• 19.552

• 20

Write down the value of n in the following statement:  $1500\ =\ 1.15\ \times10^n$  

• n = 4

• n = 3

• n = -4

• n = -3

Write down the value of n in the following statement: $0.00015=1.15\times10^n$  

• n = -4

• n = 4

• n = 5

• n = -5

Work out $2.7\times8.3\div\left(12-2.7\right)$ . Write down your answer to two decimal places. 

• 2.40

• 2.41

• 2.5

• 2.49

Calculate $\left(6-\sqrt{11}\right)^3$ , write your answer to three significant figures 

• 19.322

• 19.0

• 19.3

• 19.321

Calculate the fractions below as a single fraction: $2\frac{1}{4}\div\frac{1}{2}$  

•  $4\frac{1}{2}$   

•  $2\frac{1}{2}$   

•  $3$   

Calculate $\frac{3}{5}\div\frac{7}{10}$  as a single fraction.

•  $\frac{21}{50}$   

•  $\frac{6}{7}$   

•  $\frac{21}{2}$