Answer:
40
Step-by-step explanation:
8*10^-3=0.003
2*10^-4=0.0002
0.003÷0.0002=40
For this case, we must find an expression equivalent to:

By definition of power properties we have:

Rewriting the previous expression we have:
The "-" are canceled and we take into account that:

So:

According to one of the properties of powers of the same base, we must put the same base and add the exponents:

Answer:

Option B
Answer:
c
Step-by-step explanation: