Simplify the radical expression square root of 81x^4

Write the sentence as an equation. z plus 372 is equal to 160

To make a monster appear large in a movie, a human actor wore a costume and walked through a scale model of a city. the scale used was 1 inch = 15 feet. the actor is 60 inches tall. how tall does the monster appear in the movie? question 5 options: 720 feet 75 feet 4 feet 900 feet

Does anyone know how to do geometryme with this problem