The height should be 21 ft.
Given that,
- A 30 ft water slide forms a 45 degree angle with their surface of the water.
Based on the above information, the calculation is as follows:
[tex]sin(45^{\circ})=height\div 30\\\\height =30sin(45^{\circ})\\=30\times \sqrt 2\div 2\\\\=15\sqrt 2[/tex]
≈21.213
= 21 ft
Learn more: brainly.com/question/17429689
