Question

Find (2 × 10^7) + (3 × 10^4).

a. 2.003 × 10^4
b. 2.003 × 10^7
c. 2.03 × 10^4
d. 2.03 × 10^7

Answer 1

(2 × 10^7) + (3 × 10^4)

= (2 × 10^7) + (0.003 × 10^7) . . . . make the exponents match

= (2 + 0.003) × 10^7

= 2.003 × 10^7

The appropriate choice is ...

... b. 2.003 × 10^7