Len wants to write the number 1 using a base of 10 and an exponent. what number should he use as the exponent

For this case what we must do is use a base as a number and an exponent.

We must write an expression of the form:

Where,

b: base

a: exponent

We then have the following number:

We can write the number as:

By definition we have:

In the multiplication, if we have the same base, the exponents are added:

A number that should have used as the exponent is:

5

7

step-by-step explanation:

the answer would be 7

i think the answer is b