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Math Problems
Grade 8
Simple interest
Mona has
$
100
\$100
$100
in a savings account that earns
5
%
5\%
5%
annually. The interest is not compounded. How much interest will she earn 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
There are
s
s
s
students in the book club. The club bought
16
16
16
bookmarks, and the members shared them fairly. Choose the expression that shows how many bookmarks each member got.
\newline
Choices:
\newline
(A)
16
s
\frac{16}{s}
s
16
\newline
(B)
16
−
s
16 - s
16
−
s
\newline
(C)
16
s
16s
16
s
\newline
(D)
16
+
s
16 + s
16
+
s
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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
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
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
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
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
