1.
Which equation represents exponential decay?
A.
y
= 2.62(1.22)
x
B.
y
= 1.7(1.06)
x
C.
y
= 0.86(1.46)
x
D.
y
= 1.05(0.95)
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.
$250,000
B.
$242,000
C.
$258,000
D.
$234,000
Hint
3.
Nancy invests $100 in one account for ten years at a 9% interest rate compounded annually, and she invests $150 in an account for 10 years at a 6% interest rate compounded semi-annually. How much money will she have in the accounts after 10 years?
A.
$505.36
B.
$507.65
C.
$236.74
D.
$270.92
Hint
4.
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.
$713.82
B.
$1,713.82
C.
$741.02
D.
$1,741.02
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.
$0.40
B.
$2.43
C.
$4.32
D.
$1.90
Hint