Answer:
1. Rewriting the expression 5.a.b.b.5.c.a.b.5.b using exponents we get:

5.

6.

7.

Explanation:
Question 1:
We need to rewrite the expression using exponents
5.a.b.b.5.c.a.b.5.b
We will first combine the like terms
5.5.5.a.a.b.b.b.b.c
Now, if we have 5.5.5 we can write it in exponent as:

a.a as
b.b.b.b as:

So, our result will be:

Rewriting the expression 5.a.b.b.5.c.a.b.5.b using exponents we get:

Question:
Rewrite using positive exponent:
The rule used here will be:
which states that if we need to make exponent positive, we will take it to the denominator.
Applying thee above rule for getting the answers:
5)
6)

7)

We know that
so, we get
