Iodine-131, a radioactive substance that is effective in locating brain tumors, has a half-life of only eight days. a hospital
1 answer:
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Answer:
Step-by-step explanation:
The given expression is;
This implies that;
Equate the exponents;
Expand;
Answer: (a) 2 : 3
(b) 4 :1
Step-by-step explanation:
The Volume of a sphere is given as
and the volume of a cylinder is given as
h
The ration of their volume is the same as Volume of Sphere : Volume of Cylinder , which gives
:
h
recall that they have the same radius and the height of the cylinder is 2r , taking this into consideration, we have
:
(2r)
which gives 4 : 6 = 2 :3
(b) The area of a sphere is 4
and the surface area of the circular cylinder is
The ratio then gives
4
:
,which gives
4 : 1