12. Tristan has a square back yard with an area of 225ft sq. He started to plant grass seed but only did half his yard. (He wanted to play GTA5 Heists instead) What is the perimeter of the Grass section
of the backyard?

b.an increase in a causes b to decrease

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.