Answer:
all of the above
Step-by-step explanation:
The number 25 is a natural number as it belongs to the set [1,2,3,4,5,......]
The number 25 is a whole number as it belongs to the set [0,1,2,3,4,5,......]
The number 25 is an Integer as it belongs to the set [...,-5,-4,-3,-2,-1,0,1,2,3,4,5,...]
The number 25 is a rational number as it can be expressed as
For the same reason , number 25 is a real number as it belongs to the set of rational numbers.
So the correct option is "all of the above".
Answer:
the time taken for the radioactive element to decay to 1 g is 304.8 s.
Step-by-step explanation:
Given;
half-life of the given Dubnium = 34 s
initial mass of the given Dubnium, m₀ = 500 grams
final mass of the element, mf = 1 g
The time taken for the radioactive element to decay to its final mass is calculated as follows;
Therefore, the time taken for the radioactive element to decay to 1 g is 304.8 s.