A submarine is situated at 500 feet below sea level. If it ascends 250 feet, what is it’s new position? 250 ft. 750 ft. -250 ft. -750 ft.

If the sub  starts at 500 and ascends, meaning to head upward 250 the value would increase to 750 ft. however it the sub where to descend into the water the value would decrease as it is going further below see level.

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.