Answer:
y=25x
Step-by-step explanation:
where y is the cost and x is the dirt in cubic yards
The answers are:
18 to 24 = 
5 to 15 = 
14:42 = 
15 cents to 18 cents = 
Explanation:
To write a fraction using a ratio, simply use the first number as the numerator (top number), in this case, the numbers 18, 5, 14, and 15, and the second or biggest number as a denominator (bottom number), in this case, the numbers 24, 15, 42 and 18. This means the fractions are
,
,
, and
.
The second step is to reduce or simplify the fractions, which means the numbers in a fraction are divided by the same factor (a number that divides another without a remainder). Additionally, to do this, it is important to reduce the fraction to its minimum.
divide this by 6, which is equivalent to 
divide this by 5, which is equivalent to 
divide this by 14. which is equivalent to 
divide this by 3, which is equivalent to 
To determine the thickness of the film, we assume the shape of the film is in a form of cylinder where the thickness is equal to the height. The volume of a cylinder is expressed as:
V = pi (r^2) h
We calculate as follows:
0.23 = pi (10^2) (h)
h = 0.0007 cm