18) Without grapging, determine whether shows exponetial growth or decay?
y=129(1.23)^x
26)Suppose you deposit $ 2000 in a savings account that pays interest at an annual rate of 4%. If no money is added or withdrawn from the account, answer the following questions.
a. how much will be in the account after 3 years
b. how much will be in the account after 18 years
c. how many years will it take for the account to contain $2500
d. how many years to contain $3000
28) write an exponential function to model the situation. find the amount
a polulation of 1,860,000 decreases 1.5% each year for 12 years