Question

3. Calcule as operações

a) 1,4. 103 x 3,1. 10 2 =

b)

2,5. 10 -8x2,3. 106.​

Answer 1

Explicação passo-a-passo:

a)

$\sf 1,4\cdot10^3\times3,1\cdot10^2$

$\sf =(1,4\times3,1)\cdot(10^{3+2})$

$\sf =4,34\cdot10^5$

b)

$\sf 2,5\cdot10^{-8}\times2,3\cdot10^{6}$

$\sf =(2,5\times2,3)\cdot(10^{-8+6})$

$\sf =5,75\cdot10^{-2}$