Answer:

Step-by-step explanation:

A^2+b^2= c^2
48^2+b^2= 80^2
2304+b^2= 6400
Subtract 2304 from both sides.
b^2= 4096
Find the square root.
b= 64
I hope this helps!
~kaikers
Step-by-step explanation:
We have 8 + 12 + x = 29.
Solving, we get x + 20 = 29, x = 9.
36%=36/100=0,36
0,36•47677= 17 163,74
So there's around 17 164 species treatensd with extinction