1. which among the following is the best reason why scientific notation is important?

a) because it makes real numbers mathematical
b) because it simplifies big and small numbers
c) because it helps in mathematical computations

d) because it makes use of the powers of 10

2. In the scientific notation 5 × 10³, which is the coefficient?

a) 3
b) 5
c) 10
d) x

3. in the scientific notation 1.23 x 10–³, which shows the number of times the decimal place is moved?

a) – 3
b) 10
c) 0.23
d) 1.2

4. Which part of the scientific notation indicates the direction of the movement of the decimal point?

a) Sign of exponent
b ) Sign of coefficient
c) Power of 10
d ) position of decimal point

5. Which is the scientific notation of 789,000,000,000?

a) 789 × 10¹¹
b) 78.9 × 10¹¹
c) 0.789 × 10¹¹
d) 7.89 × 10¹¹

6. Which is the scientific notationof 0.000789?

a) 789 × 10–⁴
b) 78.9 × 10–⁴
c) 0.789 × 10–⁴
d) 7.89 × 10–⁴

7. Which is the standard form of the scientific notation 4.3 × 10⁵?

a) 43,000
b) 430,000
c) 0.00043
d) 0.0043

8. Which of the standard form of the scientific notation 4.3 × 10–5?

a) 0.000043
b) 0.00043
c) 0.0043
d) 0.043

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