Answer:
a. Decay
b. 0.5
c. 4
Explanation:
If we have a function of the form

then
a = intital amount
b = growth / decay rate factor
x = time interval
If b > 1; then the equation is modelling growth. If b < 0, then the equation is modelling decay.
Now in our case, we have

Here we see that
inital amount = a = 4
b = 1/ 2 < 0, meaning the function is modeling decay
decay factor = b = 1/2
Therefore, the answers are
a. Decay
b. 0.5
c. 4
Answer:
1.03
Step-by-step explanation:
Price of phone * 1.03 = Price of phone + Sales tax
Answer: 19.65
Step-by-step explanation:
all you need to do is add 850.99 and 129.36 to get 980.35
then subtract 980.35 and 1000 and you get your answer