Rates
A plumber charges $60 per hour. How much will 3 hours of work cost?
$180
Simplify the ratio 15:3
5:1
What is 10% of $80?
$8
Simon earns $400 a week. Calculate his yearly salary.
$20,800
(400 x 52)
Computer 1 used 3 kWh over 2 hours. How much did it use for each hour.
1.5kWh
A car travels 240 km in 3 hours. What is its average speed?
80 km/h
Simplify the ratio 24:22
12:11
What is 25% of $60?
$15
Bec works as a hairdresser and earns $67000 gross per year. Calculate her weekly gross income.
$1288.46
(67000/52)
A teacher asks students what their favourite subject is at school. Is the data being collected categorical or numerical?
Categorical
A babysitter earns $45 for 2 hours of work. What is the hourly rate?
$22.50 per hour
Simplify the ratio 11:13
11:13
What is 15% of $200?
$30
A plumber with a building company is paid $2500 for a 42-hour work week. Calculate the hourly rate.
$59.52/h
($2500/42)
What is the best chocolate?
A mechanic charges $80 call-out fee plus $35 per hour. How much will 4 hours of work cost?
$220
(80 + 35×4)
Gerald makes a fertiliser mixture mixing water with a concentrated solution. 10mL of solution is added to 1000 mL of water. Express the proportion of solution to water as a simplified ratio.
1:100
A jacket costs $120. GST is 10%. What is the total price including GST?
$132
Naomi sells cars. She works with no retainer so all earnings are from her monthly commission of sales. Naomi earns a commission of 15% of sales for the first $5000, 10% on the next $4000 and 10.5% on all excess sales. Calculate Sally’s earnings if she sells $125,000 worth of cars in a month.
$25,510
(0.15 x 5000 + 0.10 x 4000 +0.105 x 116,000)
750+400+12,180 = $25,510
Computer 1 used 2.5 kWh over 2 hours. How much did it use for each hour. Computer 2 used 4.6 kWh over 4 hours. Which is more efficient?
Computer 2
George charges $65 call-out fee plus $25 per hour for a job that will take 7 hours. Michael charges $10 call-out fee and $75 per hour for a job that he says he can do in 3 hours. Who is cheaper?
George = $240
(65 + 25×7)
Michael = $235
(10 +75 x 3)
Michael is cheaper.
Gerald makes a fertiliser mixture mixing water with a concentrated solution. 40mL of solution is added to 4 L of water. Express the proportion of solution to water as a simplified ratio.
1:100
A 75 g bowl contains 16g of fibre. Express the amount of fibre as a percentage of the weight of the bowl, correct to one decimal place.
16/75
= 0.2
$60,548
Who won the football world cup in 2022?
Argentina