Ialready know a is right but what’s the other ones that are right?

a isn't actually right, the two right answers are b and c.

step-by-step explanation:

you can rewrite using the different rules of exponents.

1) power of products rule

2) simplify inside the parentheses

3 ) negative exponent

or

1) apply negative exponent rule to only 4

2) multiply

7200

aye bru this a great thing your doin here.