1.
Which equation represents exponential decay?
A.
y
= 1.05(0.95)
x
B.
y
= 2.62(1.22)
x
C.
y
= 0.86(1.46)
x
D.
y
= 1.7(1.06)
x
Hint
2.
If a $5000 piece of equipment looses value at a rate of 5% per year, how much will it be worth after 5 years?
A.
$3868.90
B.
$4011.62
C.
$4279.35
D.
$6381.41
Hint
3.
Lance is planning to invest $5000 for a period of 3 years. He has a choice of four different investments. Which of the combinations of interest rates and compounding below will earn the most money?
A.
7.2%, annually
B.
7.125%, quarterly
C.
7%, daily
D.
7.1%, monthly
Hint
4.
Suppose Tyler sprayed around the house for ants. Which formula would be used to find the number of ants still alive after a certain time if the number of ants was changing exponentially?
A.
exponential decay
B.
compound interest
C.
cannot be determined from given information
D.
exponential growth
Hint
5.
Suppose inflation of money is at a rate of 3% per year in the United States. How much will a $1 candy bar cost in 30 years?
A.
$4.32
B.
$0.40
C.
$1.90
D.
$2.43
Hint