Multiplicative inverse of 27 is
(a) 2-7
(b) 72
(c) -27
(d) -27

Solution:

The correct answer is (b).

In exponential form, the power represents the number of times we are multiplying the base by itself.

1 billion = 1,000,000,000 = 1 × 10⁹ = 10⁹

100 billion = 100, 000,000,000 = 1 × 10¹¹ = 10¹¹

✦ Try This: Write 1million is exponential form.

Solution: 1 million = 1,000,000 = 10⁶

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 12

NCERT Exemplar Class 8 Maths Chapter 8 Sample Problem 2

The human body has about 100 billion cells. This number can be written in exponential form as (a) 10-11, (b) 1011, (c) 109, (d) 10-9

Summary:

The human body has about 100 billion cells. This number can be written in exponential form as 10¹¹

☛ Related Questions:

• (-4)⁴ × (5/4)⁴ = ____________
• (2-3)2 × (3-2)3 = ___________
• The distance between earth and sun is 150 million kilometres which can be written in exponential for . . . .