Technetium-99m is used as a radioactive tracer for certain

Last updated: 7/4/2022

Technetium-99m is used as a radioactive tracer for certain medical tests. It has a half-life of 1 day. Consider the function T where T(d) = 800 (1/2)d is the amount of radioactive material remaining d days after the test. Write a log expression that represents the number of days until only 7 amounts of radioactive material remains?