Apps. and Interpretation for IBDP Maths Ebook 1 | Page 12

Your Practice Set – Applications and Interpretation for IBDP Mathematics
1
Paper 1 – Express Quantities in Standard Form
Example
A rectangle is 3250 cm long and 2720 cm wide.
(a) Find the perimeter of the rectangle, giving your answer in the form a� 10 k , where
1�a
� 10 and k � .
[2]
(b) Find the area of the rectangle, giving your answer in the form a� 10 k , where
1�a
� 10 and k � .
[2]
Solution
(a)
(b)
The required perimeter
�2(3250 � 2750)
(M1) for correct formula
� 12000
4
�1.2� 10 cm
A1 N2
The required area
�3250 � 2750
(M1) for correct formula
� 8937500
6 2
�8.9375 � 10 cm
A1 N2
[2]
[2]
Exercise 1
1. For this question, give all the answers correct to 3 significant figures.
The diameter of a circle is 1730 cm.
(a) Find the circumference of the circle, giving your answer in the form a� 10 k ,
where 1�a
� 10 and k � .
(b) Find the area of the circle, giving your answer in the form a� 10 k , where
1�a
� 10 and k � .
[2]
[2]
2
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