A nanny charges $15 per hour, or part thereof, for looking after a child.

What does a nanny charge for looking after a child from 8 am to 3.20 pm on a day?

• $105

• $108

• $110

• $120

• A

• B

• C

• D

David earns a gross income of $890 per week.

Each week, 25% of his income is deducted in taxation. David budgets 20% of his net income.

How much does he budget to save each week?

• $44.50

• $133.50

• $489.50

• $534.00

Tom earns a weekly wage of $1025. He also receives an additional allowance of $87.50 per day when handling toxic substances.

What is Tom's fortnightly income if he handles toxic substances on 5 separate days?

• $1112.50

• $1462.50

• $2225.00

• $2487.50

A single amount of $10 000 is invested for 4 years, earning interest at the rate of 3% per annum, compounded monthly.

• 
  

  $10\ 000\left(1+0.03\right)^4$
  

• $10\ 000\left(1+0.03\right)^{48}$

• $10\ 000\left(1+\frac{0.03}{12}\right)^4$

• $10\ 000\left(1+\frac{0.03}{12}\right)^{48}$

A new car was bought for $19 900 and one year later its value had depreciated to $16 300.

What is the approximate depreciation, expressed as a percentage of the purchase price?

• 18%

• 22%

• 78%

• 82%

• $1124.86

• $2812.15

• $3624.86

• $5312.15

Calls on a mobile phone plan are charged at the rate of 54 cents per 30 seconds, or part thereof.

What is the cost of a call lasting 2 minutes and 15 seconds?

• $2.16

• $2.32

• $2.43

• $2.70

Adrian is charged compound interest at the rate of 0.036% per day on outstanding credit card balances. He has $780 outstanding for 24 days.

Which expression gives us how much compound interest he is charged?

• 
  

  $780\left(1+0.036\%\right)^{24}$
  

• $780\left(1+0.036\%\right)^{24}-780$

• $780\times0.036\%\times24$

• $\left(780\times100.036\%\times24\right)-780$

Ira works a 35-hour week and is paid an hourly rate of $18.

Any overtime hours worked are paid at time-and-a-half.

In a particular week she earned $1008.

How many hours in total did Ira work in this week to earn this amount?

• 37.3

• 42

• 49

• 56