Respostas
Resposta:
taaaaaammmbeeemmmm precisoooooo urrrggeeennteee
Resposta:
c) 5,0x10^-2 x 2,6x10^-4
13x10^-2-4
13x10^-6
d) (8,4x10^5)÷(4,0x10^8)
= 8,4x10^5
4,0x10^8
= 8,4 x 10^5
4,0 x 10^8
= 2,1 x 10^5
10^8
= 2,1x10^5-8
= 2,1x10^-3
e) (1,5x10^-6)÷(7,5x10^-2)
= 1,5x10^-6
7,5x10^-2
= 1,5 x 10^-6
7,5 x 10^-2
= 0,2 x 10^-6
10^-2
= 0,2x10^-6-(-2)
= 0,2x10^-6+2)
= 0,2x10^-4
= 2x10^-1 x 10^-4
= 2x10^-1-4
= 2x10^-5
f) (3x10^4)^3
= 3^3 x (10^4)^3
= 27 x (10^4)^3
= 27x 10^4×3
= 27 x 10^12
= 2,7x10^1 x 10^12
= 2,7x10^1+12
= 2,7x10^13
g) (-2x10^-4)^2
= (-2)^2 x (10^-4)^2
= 4 x (10^-4)^2
= 4x10^-4×2
= 4x10^-8
h) √4x10^4
= ✓4x√10^4
= √2^2 x 10^2
= 2x10^2
i) √4,9x10^2
= √4,9x100
= √490
= √7^2 x10
= √7^2 x√10
= 7√10
j) 2,30x10^3 + 4,2x10^4
= 2,30x10^3 + 4,2x10^1+3
= 2,30x10^3 + 4,2x10x10^3
= (2,3+4,2x10)x10^3
= ( 2,3+42)x1000
= 44,3x1000
= 44300
= 44,3x10^4
k) 5,8x10^-3 - 40x10^-4
= (5,8x10-40)x10^-4
= (58-40)x10^-4
= 18x10^-4
Espero ter ajudado!!
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