Units Of Measurement And Applications Worksheet Page 40
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4420
What would be the value of a $30 000 painting after 2 years if it increases in value by 20% in the fi rst year and
then decreases in value by 20% in the second year?
A $4800
B $24 000
C $28 800
D $30 000
21
If 6 loaves of bread cost $12.84, the cost of 10 loaves is:
A $21.40
B $2.14
C $128.40
D $214
22
Melissa receives a 20% discount on a pair of jeans. If she pays $68 for the jeans, the amount she saved is:
A $13.60
B $17
C $85
D $51
If you have any diffi culty with these questions, refer to the examples and questions in the sections listed.
Question
1
2–4
5–8
9
10–12
13–15
16, 17
18–20
21, 22
Section
A
B
C
D
E
G
H
I
J
2A
REVIEW SET
1 Round 3659.063 to:
a the nearest 100
b the nearest whole number
c 2 decimal places
d 3 signifi cant fi gures
e 5 signifi cant fi gures
f 1 signifi cant fi gure.
2 State whether these numbers are written in scientifi c notation.
a 6 × 1000
b 15 × 10
c 2.04 × 10
−6
7
3 Express these numbers in scientifi c notation.
a 105 000 000
b 0.000 062
4 Calculate the following, writing the answers in scientifi c notation.
a (4.1 × 10
) × (6 × 10
b (1.96 × 10
) ÷ (1.4 × 10
−3
8
5
7
)
)
___________
c (8 × 10
d √
8.41 × 10
−12
5
)
4
5 Convert the following.
a 5.6 cm
2
to mm
2
b 43 000 m
2
to ha
c 2.9 m
3
to cm
3
d 5600 mm
3
to cm
3
6 Convert the following.
a 2.3 Gm to m
b 52 ML to kL
c 3 ms to μs
7 Convert the following to minutes.
a 3.5 h
b 3 h 50 min
8 Convert 258 s to:
a minutes
b minutes and seconds.
9 For each of the following measurements, fi nd:
i
the limit of reading
ii
the greatest possible error
iii
the lower and upper limits of the true measurement
iv
the percentage error (to 1 decimal place).
a 7.5 m
b 280 g to the nearest 10 g
74
Insight Mathematics General 11
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