Express the following as powers of 10.

$b)100,000=\_\_\_\_\_\_\_\_\_\_$

1. We can write $100,000=10\times 10\times 10\times 10\times 10$
2. The exponent of a number expresses how many times the number is multiplied by itself.
3. Here 10 is multiplied by itself five times. Therefore we have to use 5 as an exponent of 10 here i.e.${10}^5$.

Hence $100,000={10}^5.$