Question

5) Resolva as seguintes operações dando o resultado em notação científica: a) 2.10⁴ x 7.10³ b) 5.10⁵ x 7.10-³ c) (1.10-⁵) : (4.10⁵) d) (8.10²) : (2.10-⁶)

Answer 1

a) $2$ · $10^4$ × $7$ · $10^3$ = $14$ · $10^7$∴ $1,4$ · $10^6$

b) $5$ · $10^5$ × $7$ · $10^{-3}$ = $35$ · $10^{2}$ ∴ $3,5$ · $10$

c) $1$ · $10^{-5}$ ÷ $4$ · $10^5$ = $4$ · $10^{-10{$

d) $8$ · $10^{2}$ ÷ $2$ · $10^{-6$ = $16$ · $10^8$ ∴ $1,6$ · $10^7$