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Math Problems
Grade 8
Simple interest
Amy has
$
90
\$90
$90
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much will she have in total in
2
2
2
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
_
\_\_\_\_\_
_____
Get tutor help
Darnel has
$
50
\$50
$50
in a savings account that earns
5
%
5\%
5%
annually. The interest is not compounded. How much interest will he earn in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
_
\_\_\_\_\_
_____
Get tutor help
Deb has
$
60
\$60
$60
in a savings account that earns
5
%
5\%
5%
annually. The interest is not compounded. How much will she have in total in
1
1
1
year?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
\_\_\_\_
____
Get tutor help
Gwen has
$
40
\$40
$40
in a savings account that earns
5
%
5\%
5%
annually. The interest is not compounded. How much interest will she earn in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
\_\_\_\_
____
Get tutor help
Megan has
$
100
\$100
$100
in a savings account. The interest rate is
5
%
5\%
5%
per year and is not compounded. How much interest will she earn in
3
3
3
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_____
Get tutor help
Lexi has
$
100
\$100
$100
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much interest will she earn in
3
3
3
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
_
\_\_\_\_\_
_____
Get tutor help
Maddie has
$
80
\$80
$80
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much will she have in total in
1
1
1
year?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
___
Get tutor help
Kinsley has
$
70
\$70
$70
in a savings account that earns
10
%
10\%
10%
interest per year. The interest is not compounded. How much interest will she earn in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
_
\_\_\_\_\_
_____
Get tutor help
Nate has
$
40
\$40
$40
in a savings account that earns
10
%
10\%
10%
annually. The interest is not compounded. How much will he have in total in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
\_\_\_\_
____
Get tutor help
Barry has
$
90
\$90
$90
in a savings account that earns
10
%
10\%
10%
annually. The interest is not compounded. How much interest will he earn in
2
2
2
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_____
Get tutor help
Ivan has
$
30
\$30
$30
in a savings account that earns
10
%
10\%
10%
annually. The interest is not compounded. How much will he have in total in
1
1
1
year?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
___
Get tutor help
Rodrigo has
$
20
\$20
$20
in a savings account that earns
10
%
10\%
10%
annually. The interest is not compounded. How much interest will he earn in
4
4
4
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
___
Get tutor help
Luther has
$
80
\$80
$80
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much will he have in total in
3
3
3
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
___
Get tutor help
Wyatt has
$
60
\$60
$60
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much interest will he earn in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_____
Get tutor help
Tara has
$
40
\$40
$40
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much will she have in total in
1
1
1
year?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
___
Get tutor help
Eve has
$
70
\$70
$70
in a savings account. The interest rate is
5
%
5\%
5%
per year and is not compounded. How much interest will she earn in
4
4
4
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
_
\_\_\_\_\_
_____
Get tutor help
Henry has
$
70
\$70
$70
in a savings account that earns
10
%
10\%
10%
interest per year. The interest is not compounded. How much interest will he earn in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_____
Get tutor help
Wanda has
$
90
\$90
$90
in a savings account. The interest rate is
10
%
10\%
10%
per year and is not compounded. How much interest will she earn in
5
5
5
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_____
Get tutor help
Hugo has
$
30
\$30
$30
in a savings account that earns
10
%
10\%
10%
annually. The interest is not compounded. How much will he have in total in
3
3
3
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_
_
_
_
\_\_\_\_
____
Get tutor help
Paul has
$
40
\$40
$40
in a savings account. The interest rate is
5
%
5\%
5%
per year and is not compounded. How much interest will he earn in
4
4
4
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
\newline
$
\$
$
_____
Get tutor help
Oliver has
₹
60
\text{₹}60
₹
60
in a savings account that earns
10
%
10\%
10%
interest per year. The interest is not compounded. How much interest will he earn in
4
4
4
years?
\newline
Use the formula
i
=
p
r
t
i = prt
i
=
p
r
t
, where
i
i
i
is the interest earned,
p
p
p
is the principal (starting amount),
r
r
r
is the interest rate expressed as a decimal, and
t
t
t
is the time in years.
Get tutor help
Jamal went shopping for a new phone. Sales tax where he lives is
8
%
8 \%
8%
. If the price of the phone is
p
p
p
dollars and cents, which expression represents the total price plus tax?
\newline
1.008
p
1.008 p
1.008
p
\newline
8
p
8 p
8
p
\newline
0.08
p
0.08 p
0.08
p
\newline
1.08
p
1.08 p
1.08
p
Get tutor help