Answer:
-2265
Step-by-step explanation:
First, we replace x with 20.
![f(20)=-5*20^2-13*20-5](https://tex.z-dn.net/?f=f%2820%29%3D-5%2A20%5E2-13%2A20-5)
Then, we evaluate.
The * stands for multiplication.
![f(20)=-5*20^2-13*20-5\\-5*400-260-5\\-2000-260-5\\-2265](https://tex.z-dn.net/?f=f%2820%29%3D-5%2A20%5E2-13%2A20-5%5C%5C-5%2A400-260-5%5C%5C-2000-260-5%5C%5C-2265)
You subtract the length of the Lupu Bridge by the length of thee Hart Bridge after you round them to the nearest thousandth and you get your final answer!
12,795 -> 13,000
3,845 -> 4,000
13,000 - 4,000 = your answer
Kilometers per hour and miles per hour would be the most reasonable to measure someone running a race. Millimeters and inches are too small.
F^-1(x)=12+x hope this is what you need