The half-life of cesium-137 is 30 years. suppose we have a 170 mg sample.(a) find the mass that remains after t years.(b) how much of the sample remains after 60 years? (round your answer to two decimal ) after how long will only 1 mg remain? (round your answer to one decimal place.)

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step-by-step explanation:

c

step-by-step explanation:

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)