Answer:
50 feet
Step-by-step explanation:
Given the the path of an object at a 45° with initial velocity of 80 feet per second modeled by the equation
where;
x is the horizontal distance traveled and h(x) is the height in feet, if x is given as 100 ft, the height of the object will be gotten by simply substituting x = 100 into the modeled function as shown;

Hence height of the object when it has traveled 100 feet away horizontally is 50 feet.