The rules of exponents apply to powers of 10 used in scientific notation. The associative and commutative properties of multiplication also apply.

<h3>Application</h3>

(a^b)(a^c) = a^(b+c)

The numerical product is ...

$(9\cdot10^9)\cdot(-2\cdot10^{-3})=(9)(-2)(10^{9-3})=\boxed{-18\cdot10^6}$

<em>Additional comment</em>

Expressed in scientific notation, the result would be ...

$-1.8\cdot10^7$

Your calculator can perform this multiplication for you.

8 0

1 year ago

N(U) =25,n(A)= 16 ,n°(B)=2 & n(AUB)=?<br>

sweet [91]

Answer:

Step-by-step explanation:

n(AUB) = n(A) + n⁰(B)

= 16 + 2

= 18

7 0

3 years ago

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