What is the ratio 5: 17 in simplest form

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?