What is the answer of this question?

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?