1. 
Simplify the expression . > 7

2. 
Simplify the expression . > 10

3. 
Write 250, 600, 000, 000 in scientific notation. > 2.5 × 10^{11}

4. 
Write 3.405 × 10^{12} in standard notation. > 0.000000000003405

5. 
Simplify the expression . > 120

6. 
Simplify the expression . > Not a real number

7. 
Simplify the expression ((10^{2})^{2})^{2}. > 100,000,000

8. 
Simplify the expression . > 1

9. 
Simplify the expression . >

10. 
Simplify . > 2.5 × 10^{3}
