Answer:
40 cm
Step-by-step explanation:
Using the conversion
1 litre = 1000 cm³, then
40 litres = 40 × 1000 = 40000 cm³
The volume ( V) of a cuboid is
V = lbh ( divide both sides by bh )
l = =
=
= 40 cm
A tablet cost $700 in January. 6 months later the cost of the tablet was $475 what is the percent change? Is it an increase of d
1 answer:
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Answer:
minimum and value of 4
Step-by-step explanation:
When we will be able to get the critical points.
The graph is a quadratic graph with a 'U' shape, thus it has a minimum critical point.
Start by stating the given info as mathematical expressions:
1. "<span>The width of a rectangle is 6 cm less than its length."
2. "I</span><span>ts perimeter is 80 cm."
Using the formula for perimeter (
) we can show:
.
We now have 2 equations in 2 unknowns and can solve by substitution:
</span>
The length is 23cm.
Having the length w can then find the width:
The width is 17cm.
And finally the area:
The area is
.
As a check we can use the known perimeter:
Checks true.
1. "<span>The width of a rectangle is 6 cm less than its length."
2. "I</span><span>ts perimeter is 80 cm."
Using the formula for perimeter (
We now have 2 equations in 2 unknowns and can solve by substitution:
</span>
The length is 23cm.
Having the length w can then find the width:
The width is 17cm.
And finally the area:
The area is
As a check we can use the known perimeter: