Please answer this question now

What is the value of the expression below? (81^2)^1/8

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

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?