This is. Pemdas. P is puntion. M mutupaTy d division a. Aadd s subtraant
Exponential decay formula is
x= hours past
after 2 hours, there are 18 mg of medicine left
A= y*z- w*(z-x)=10*5-5*(5-3)=50-5*2=50-10=40 in.^2
B is the answer
The answer is 1.
Check out the attached image to see how I got this answer.