12. [-/0.38 Points] DETAILS SPRECALC7 4.2.501.XP.MI. 0/5 Submissions Used MY NOTES ASK YOUR TEACHER Doctors use radioactive iodine as a tracer in diagnosing certain thyroid gland disorders. This type of iodine decays in such a way that the mass remaining after t days is given by the function m(t) = 8e-0.088t where m(t) is measured in grams. (a) Find the mass at time t = 0. grams (b) How much of the mass remains after 9 days? (Round your answer to three decimal places. ) grams Need Help? Read It Master It 13. [-/0.38 Points] DETAILS SPRECALC7 4.3.002. 0/5 Submissions Used MY NOTES ASK YOUR TEACHER The function f(x) = log16(x) is the logarithm function with base So f(16) = , f(1 ) =[ (Is ) f(256) = and f ( 4 ) = Need Help? Read It5. [-/0.38 Points] DETAILS SPRECALC7 4.1.022.MI. 0/5 Submissions Used MY NOTES ASK YOUR TEACHER Find the exponential function f(x) = a* whose graph is given. f ( x ) = 4 3 2 (- 1, X -2 -1 1 2 Need Help? Read It Watch It Master It2:54 PM WedOctS nun 4?87%-i webassignnet E w in El MATH 128 (... 35. [-/O.38 Points] DETAILS SPRECALC7 4.3.085. 0/5 Submissions Used MY NOTES ASK YOUR TEACHER Consider the following. f(x) = 2X, g(x) = x + 7 Find the function fog and its domain. (Enter your answer for domain in interval notation.) f.9(>