Apps. and Interpretation for IBDP Maths Ebook 1 | Página 371

Answers
Exercise 21
Chapter 9
21.1 (a) 1.331 m
(b) 2.36 m
(c) 15.9 m
21.2 (a) $59
21.3 (a)
(b) 100�
0.9 n�1
(c) $21527
3
308000 cm
(b) 2
21.4 (a) 78.7 km
(b) 7.87 km
(c) 17th February
Exercise 22
22.1 (a) 1155 EUR
(b) 10648.9275 EUR
(c) 2018
(d) 2032
(e) 22050 EUR
22.2 (a) (i) v
n
(ii)
(iii)
(iv)
t
n
u
n
w
n
(b) (i) v100 � 99050
(ii) 301250
(c) (i) 3200
(ii) 819150
(d) m � 8
22.3 (a) (200n � 2200) m
(b) x � 40
(c)
1
6.24� 10 km
(d) 3100 m
(e) w � 43
22.4 (a) 6120 EUR
(b) 40600 EUR
(c) 20500 EUR
(d) m � 25
(e) n � 26
Exercise 23
23.1 (a) P � 456800 EUR
(b) Q � 359500 EUR
23.2 (a) $315000
(b) 10
23.3 (a) P � 71300
(b) 24
23.4 t1�t2 � 0.0861
Exercise 24
24.1 (a) P � 98000 EUR
(b) r � 6.03
24.2 (a) P � 860000
(b) n � 7.15
24.3 n � 3.96
24.4 k � 2.51
Exercise 25
25.1 (a) P � 229000
(b) 5.4%
(c) $282000
25.2 (a) 10.9%
(b) 13000 EUR
25.3 (a) r � 3.02
(b) 0.983%
25.4 (a) (9.5223 � i)%
(b) i � 6.43
Exercise 26
26.1 (a) $1290
(b) 16.7 years
26.2 (a) $64600
(b) $172000
26.3 (a) $26400
(b) $341
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