-4× - 12 <4 what is the answer

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?