1) An adult takes 400 milligrams of ibuprofen (the chemical name for the active ingredient in Advil). Each hour the amount of ibuprofen in the person's system decreases by 29%.
a. What is the exponential function that models the decay of ibuprofen in the person's body
b. How much ibuprofen is left in the person's body after 4 hours?
c. How long until there is only 40 milligrams left in their body?

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like:

idk

step-by-step explanation: