Answer:
a)
, b) 
Step-by-step explanation:
a) The instantaneous rate of change is:



b) The slope of the tangent line is equal to the instantaneous rate of change found previously.

Answer:
1.97 ounces
Step-by-step explanation:
-The exponential decay function is given by the formula:

Given that the half-life is 4 days, we can substitute in the formula to solve the rate of decay for a single half-life:

#Since, 1 week has 7 days, 3 weeks is a 21-day period, thus, t=21.
#We substitute and solve for the amount remaining after 21days of decay:

Hence, the amount remaining after 3 weeks of decays is approximately 1.97 ounces
Answer:
x=1000 or 10 to the 3rd power
Answer:
Options A, C and D are correct ones.
Step-by-step explanation:
Options A, C and D are correct.