Answer:

Step-by-step explanation:

Formula used = 

 
        
             
        
        
        
You want the (positive) distance when the height is 0, 0= -d^2 + 10d +5.
You would factor that out(You'd get radicals), and the final answer would be
<span>5±<span>30<span>−−</span>√</span></span><span>
You'd take the only positive one of the two, 5 + srt(30)
I hope I did that right :/</span>
        
             
        
        
        
Not exactly sure if I perfectly remember distributive property but you could right that like 18j + 24 + 15j
        
             
        
        
        
Answer:
1/12 or 0.08333333333
Step-by-step explanation:
5/60 can be factored  to 1/12 because the two numbers are each divisible by 5.