Math Word Problems Worksheet Page 9
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11Note: (M1) for equating compound interest formula
to 9058.17
n =10 correct answer only
(A1)
So 30 months, (ft) on their n
(A1)(ft)
Note: Award (C2) for 2.5 seen with no working
(C3)
[6]
17.
Financial penalty (FP) may apply in this question.
33.09 × 24
(a)
(A1)
Note: (A1) for 33.09 seen
FP
= $794.16
(A1) (C2)
794.16 × 36
(b)
(M1)
Note: For multiplying their (a) by 36. Can be implied.
FP
= $28 589.76
(A1)(ft) (C2)
10
837
.
80
(c)
(M1)
10
18
= 60.21
Rate = 5.5
(A1) (C2)
[6]
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18.
(a)
X(1.005)
(A1)
r
12
(b)
X(1.005)
= X
1
(M1)
100
Note: Award (M1) for equating follow through from (a).
r = 100(1.0617) – 100 (or equivalent)
(M1)
Note: Award (M1) for isolating r correctly.
Rate = 6.17%
(A1)
[4]
IB Questionbank Mathematical Studies 3rd edition
9
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