Answer:
(a)
In this question, you can simply just multiply the exponent of 2 and the exponent of 5, in order to get a power of 10.
(b)
For this question, we need to organize the numbers as a fraction
We need to subtract the exponents from each variable. In
and y, we need to subtract 3-1 to get
. In
and
, we need to subtract 7-3 to get
. Now, we can divide 12 and 6 normally to get 2. So, the answer would be
.