An expression is shown.



2.1×105 + 4.3×104



Which expression is equivalent?

A

2.53×104

B

2.53×105

C

6.4×105

D

6.4×109

25.3 × is the equivalent expression

Step-by-step explanation:

In this question, we are asked to select from the options the expression that is equivalent to the written expression.

2.1 ×  + 4.3 *

Now, we can factor out .

This gives;

{[2.1 × 10] + 4.3}

( 21 + 4.3)

= × 25.3

-6 is the correct option from the above given options

ab will be equal to