The solutions to the system are -11.3 and 11.3.
The length of one leg of the sun shade is 11.3 feet.
Steps:
graph y=1/2 x^2
graph y=64
zoom out.
find the points of intersection.
done.
1/8 why? because 1/2 for the first head. times 1/2 for the second head. times 1/2 for the third head
Sixty miles over four gallons would reduce down to 15 miles over one gallon which would 15 miles per gallon.

if correct mark me as brainiest