Answer:
A spehere
Step-by-step explanation:
A sphere only made up of a curved surface
on the other hand, a cone, cylinder, etc, have a flat surface. for a cone it's the floor. for a cylinder it's the ceiling and the floor of the object
√x + 9 - 4 = 1
√x + 5 = 1
√x = -4
√x = √-4
x = 2i