Verified Answer :

apologiabiology

scientifice notation is
(number less than 10 but greater than or equal to 1) times (10^x)

remember
(ab)(cd)=abcd=(ac)(bd)

and
(x^m)(x^n)=x^(m+n)

so
(210^4)(3.110^20)=
(2)(10^4)(3.1)(10^20)=
(23.1)(10^410^20)

(10^4)(10^20)=10^(4+20)=10^(24)

(6.2)(10^24)

scientifie notiaotn is
6.2*10^24

2d option

Petroniusz

(2,0 10⁻⁴) (3,1 10⁻²⁰) =

the order of multiplication factors not relevant

2,0 3,1 10⁻⁴ 10 ⁻²⁰ =

6,2 *10 ⁻⁴ ⁺⁽⁻²⁰⁾ = 6,2⁻²⁴

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