Question

Exercise 21
1. Calculate:
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(a) 30% of $50
(b) 45% of 2000 kg
(c) 4% of $70
(d) 2.5% of 5000 people
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2. In a sale, a jacket costing $40 is reduced by 20%. What is the sale price?
3. The charge for a telephone call costing 12 cents is increased by
cholo
10%. What is the new charge? doum WoH
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4. In peeling potatoes 4% of the mass of the potatoes is lost as 'peel'.
How much is left for use from a bag containing 55 kg?
orto
5. Work, to the nearest cent:
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(a) 6-4% of $15.95
0-12 lo nom
(b) 11.2% of $192.66
(C) 8.6% of $25.84
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(d) 2.9% of $18-18
6. Find the total bill:
92597590 TO 9259
5 golf clubs at $18.65 each
60 golf balls at $16.50 per dozen
samol or
1 bag at $35.80
Sales tax at 15% is added to the total cost.
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7. In 2000 a club has 250 members who each pay $95 annual
2201 lotto
subscription. In 2001 the membership increases by 4% and the
annual subscription is increased by 6%. What is the total income in ling
from subscriptions in 2001?
8. In 1999 the prison population was 48 700 men and 1600 women.
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What percentage of the total prison population were men?
9. In 1999 there were 21 280 000 licensed vehicles on the road.
Of these, 16 486 000 were private cars. What percentage of the
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licensed vehicles were private cars?
25
10. A quarterly telephone bill consists of $19.15 rental plus 4.7 cents for
each dialled unit. Sales tax is added at 15%. What is the total bill
for Mrs Jones who used 915 dialled units?
11. Hassan thinks his goldfish got chickenpox. He lost 70% of his Tools
collection of goldfish. If he has 60 survivors, how many did he have
originally?
12. The average attendance at Parma football club fell by 7% in 1999.
If 2030 fewer people went to matches in 1999, how many went in
1998?
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13. When heated an iron bar expands by 0.2%. If the increase in length
is 1 cm, what is the original length of the bar?
14. In the last two weeks of a sale, prices are reduced first by 30% and
then by a further 40% of the new price. What is the final sale price
of a shirt which originally cost $15?.​

Answer 1

Answer:

Good  question

Step-by-step explanation: