Question

Find the product of 21 and (6.3 · 10^-4).

A) 0.1323 · 10^-1
B) 1.323 · 10^-3
C) 1.323 · 10^-2
D) 1.323 · 10^2

Answer 1

To multiply numbers in standard form, we first multiply the numbers and then simplify them to standard form

To find the product of

21 and 6.3 ×
`10^(-4)`

We shall first multiply

21 & 6.3

We get 21 × 6.3 = 132.3

Now converting this to a standard form we get

1.323 ×
`10^2`

Product of 21 & 6.3 ×
`10^(-4)`

= 1.323 ×
`10^2` ×
`10^(-4)`

=1.323 ×
`10^(-2)`

Option C) is the right answer