Question

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)?

A. 5.0 × 103
B. 5.0 × 10-3
C. 5.0 × 1017
D. 5.0 × 10-17

Answer 1

That would be A.

2.5*2*10^(10-7)=5*10^3

Answer 2

Answer: The correct option is,

A.
`5.0* 10^3`

Step-by-step explanation:

Given expression,

`(2.5* 10^(10))* (2.0* 10^(-7))`

`=2.5* 2.0* 10^(10-7)`

( By using product property of exponent i.e.
`a^m* a^n = a^(m+n)` )

`=5.0* 10^3`

Therefore,

OPTION A is correct.