Applying operations on numbers expressed using scientific notation to solve mathematical and real-world problems

Solve. 
 $\frac{9.03\times10^6}{2.1\times10^4}$  

•  $4.3\times10^2$  

•  $4.3\times10^1$  

•  $6.93\times10^2$  

(8.232 x 10^-6) x (1.1 x 10^-3)

• 9.0552 x 10^-3
• 9.0552 x 10¹⁸
• 9.0552 x 10^-18
• 9.0552 x 10^-9

(9.6×10³) × (6.7×10²)

• 64.32×10⁵
• 6.432×10⁶
• 64.32×10⁶
• 64.32×10⁵

(3.4 x 10⁵)(1.2 x 10^-4)

• 4.08 x 10^-8

• 4.8 x 10²

• 4.08 x 10¹

• 4.08 x 10^-15

The population of Crowded Town is 4 × 10⁶ and the population of Empty Village is 8 × 10³. How many times greater is the population of Crowded Town to Empty Village?

• 30

• 500

• 5

• 2

(9.6×10^-8)÷(2×10^-15)

• -4.8×10⁷
• 4.8×10⁷
• 4.8×10^-7
• -4.8×10^-7

Which star is closer to the Earth, Peacock or Sirius?

• Peacock

• Sirius

solve:

(3.14x10³)(5.2x10²)

• 1.63280x106⁶

• 1.6328x10⁶

• 8.34x10⁴

• 8.344x10⁴

The dimensions of an office building are 1.5 x 10² feet by 1.35 x 10³ feet. What is the perimeter of the base of the building, in feet? 

• 1.50 x 10³
• 2.85 x 10 ⁵
• 3.00 x 10 ³
• 5.70 x 10 ⁵