Question

The exponent of the variable b in Marina’s solution should be

-7
-1
7
1

Answer 1

Answer: 7

Explanation:

Keeping on mind the exponents properties, when you have two powers with equal base and they are dividing each other, you must subtract the exponents.

The exponents of b in the numerator is 4 and in the denominator is 3. Therefore you have:

`b^(4-(-3))=b^(7)`

The exponent is 7

Answer 2

Option C is answer.

Explanation:

Here we can see the terms of b are in the numerator and in denominator

but sign of exponent of b in the denominator is negative

therefore for simplifying the exponent of b ,we have to apply exponent rule of division which is
`(a^m)/(a^n) =a^(m-n) \\`

Here terms of b are
`(b^4)/(b^-3) =b^(4-(-3)) \\`

`b^7`

therefore exponent of b is 7 on simplifying.