Question

Sabendo que a=10(expoente )-7,b=10(expoente)11 e c=10(expoente)-4 determine.
A.b
A.c
B.c
A.b.c

Answer 1

$a = 10^{-7}$
$b= 10^{11}$
$c= 10^{-4}$

$a . b = 10^{-7}. 10^{11} = 10^{-7+11}= 10^{4} = 10 000$

$a . c = 10^{-7}. 10^{-4} = 10^{-7+(-4)} = 10^{-11}$$= \frac{1}{ 10^{11} } = \frac{1}{100 000 000 000}$

$b . c = 10^{11} . 10^{-4}= 10^{11+(-4)} = 10^{7} = 10 000 000$

$a . b . c = 10^{-7}. 10^{11}. 10^{-4}= 10^{0}=1$