1.
Which equation represents exponential decay?
A.
y
= 0.86(1.46)
x
B.
y
= 1.05(0.95)
x
C.
y
= 2.62(1.22)
x
D.
y
= 1.7(1.06)
x
Hint
2.
The Mendoza family just bought a house for $180,000. If the value of the house increases at a rate of 3% per year, about how much will it be worth in 10 years?
A.
$242,000
B.
$258,000
C.
$234,000
D.
$250,000
Hint
3.
Ricky invested $1000 in an account at 8% interest compounded quarterly. How much money will he have earned on the account after 7 years?
A.
$741.02
B.
$713.82
C.
$1,741.02
D.
$1,713.82
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.
compound interest
B.
exponential decay
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.
$1.90
B.
$2.43
C.
$0.40
D.
$4.32
Hint