Math Word Problems Worksheet Page 7
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2
3
4
5
6
7
8
9
10
11n
r
12.
A = C
1
100
2
r
125 = 100
1
(M1)
100
2
r
1.25 =
(M1)
1
100
r
1.11803398 – 1 =
(M1)
100
r = 11.8% (3 s.f.)
(A1) (C4)
[4]
13.
Financial accuracy penalty (FP) is applicable where indicated.
(a)
1 BRL = 2.607 ZAR
300 2.607 = 782.10 ZAR
FP
(i)
(A1)
Note: 782.1 is (A0)(FP)
1
FP
(ii)
300
115
.
07
BRL
(A1)(ft) (C2)
. 2
607
Note: Follow through only if processes are reversed.
3
(b)
Time period is
(A1)
4
Interest is 8.10
(A1)
3
150
r
4
8.1
or
8.10
(M1)
100
r = 7.2
(A1) (C4)
3
Notes: Award (A1) for
seen. Award (A1) for 8.1 seen.
4
3
Award (M1) for the equation with
or 9 and either 8.1 or
4
158.1.
There is no follow through in part (b).
[6]
IB Questionbank Mathematical Studies 3rd edition
7
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