An open concrete tank is internally 1m wide, 2m long and 1.5m deep, the concrete being 10cm thick. Calculate
a) The capacity of the tank in litres.
b.) The volume of concrete used in metres cube
recall that 1L = 1000cm^3
(a) v = 100*200*150 cm^3
(b) Assuming no top, v = (100+20)*(200+20)*10 + 2((100+10)+(200+10))*150*10 cm^3 minus the volume from (a)
watch the units
3000 litres and 1.224m³
8 miles per gallon
Ruth bought a piece of farm machinery valued at $50,000. Over a period of 10 years, the machinery lost value at a constant rate. The graph below models this loss of value.
Which statement most closely matches this relationship?
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1 point
Captionless Image
The machinery ages 3 years for every $10,000 loss in value.
The machinery ages 5 years for every $10,000 loss in value.
Each year, the machinery loses a value of $4,500.
Each year, the machinery loses a value of $2,500.
Each year, the machinery loses a value of $4,500.
Which of the following is a graph of y = 3/2 x^2?
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1 point
Option 1
Option 2
Option 3
Option 4
Option 2
The table shows the amount of money Angelica earned based on the number of hours she worked.
Angelica's Pay
Hours Worked (h) Amount Earned (A)
3 $22.50
8 $60.00
15 $112.50
Which equation best represents Angelica's pay?
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1 point
A = 7.50h
A = 22.50h
A = h + 7.50
A = h + 22.50
A = 7.50h
Which equation is true for all x- and y- values in the table below?
x y
1 7
2 14
3 21
4 28
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1 point
y = x + 7
y = x – 7
y = x /7
y = 7x