Please help me! I need part A and part B! I will appreciate it very much and I will mark Brainllist

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

Which statement about perfect cubes is true

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1