1. A sample of radium has a weight of 2.5 mg and a half-life of approximately 8 years.
a. How much of the sample will remain after 8 years? 4 years? 2 years?
b. Find a function which models the amount of radium f(t), in mg, remaining
after t years.

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13

answer: 5

step-by-step explanation:

since, the range is the difference between the lowest and highest values of the given sample space.

and, here the sample space = { 3, 1, 0, 4, 1, 4, 2, 3, 0, 5, 0, 1, 1, 2, 0, 4, 1,4, 4 ,2 ,3 ,2 ,0 ,1 ,4 }

here, the highest value of the given sample = 5

and, the lowest value = 0

therefore, the range of the sample space = 5 - 0 = 5