7. lodine-131 is a radioactive isotope used in the treatment of thyroid conditions. It has a half-life of 8 days. Half-life is the amount of time it takes for half of the substance to decay (disappear). If a patient is
given 20 mg of iodine-131, how much of the substance will remain in the body after 32 days?

c is the final : )

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step-by-step explanation:

c

step-by-step explanation:

c

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)