Please help again thank u

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2