To answer this you have to use Pythagoras's theorem: a^2 + b^2 = c^2
Put in the values:
5^2 + 15^2 = c^2
Simplify it:
25 + 225 = c^2
Simplify again:
250 = c^2
Square root both sides:
15.8113883008 = c
So the ramp is:
15.8113883008 feet
Now round the number: 
15.8ft
The above is the answer :)
(btw sorry in advance if you've spotted a mistake)
        
             
        
        
        
Answer:
An equilateral triangle has 3 lines of symmetry
Hope this helps
Step-by-step explanation:
 
        
             
        
        
        
Only like sedans: 25- 15 = 10
Only like hatchbacks: 40-15 = 25
Like both: 15
Like none of them: 100-10-25-15 = 50
Dislike sedans: 100 - 10-15 = 75
Dislike hatchbacks: 100-25-15 = 60
So dislikes: sedans>hatchbacks
        
             
        
        
        
Answer:
Burning of fossil fuels impacts the weather negatively 
 
        
             
        
        
        
Answer 4 
4multiplyed by 4 is 16