Answer:
uh ma'am - you need help this totally make sense ^_^
An equation that shows the dependence of
on
is
and the domain of the function is
.
Total number of cents
.
She bought
pencils for
cents each.
Let
equals the number of cents left.
So,
.
Here
must be positive
So,

Domain of a function is the set of values for which the function is defined.
So,
can get values from
to
.
Therefore, the domain is:
.
Learn more about domain here:
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The cost to equip all the stations in the chemistry lab is calculated as: $393.75.
<h3>How to Calculate Total Cost?</h3>
In this scenario, we are given the following:
Total number of stations = 21 stations
Length of rubber tubing each of the stations in the chemistry lab needs = 5 feet
Total length of rubber tubing needed for all stations in the chemistry lab = 21 × 5 = 105 feet
Cost of 1 rubber tubing = $6.25 per yard
Convert 5 feet to yard:
1 yard = 3 feet
x yard = 5 feet
x = (5 × 1)/3
x = 5/3 feet.
So, the cost of 1 rubber tubing = $6.25 per 5/3
Cost of total length of tubbing needed = (105 × 6.25)/5/3 = (105 × 6.25) × 3/5
Cost of total length of tubbing needed = $393.75
Therefore, the cost to equip all the stations in the chemistry lab is calculated as: $393.75.
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It is easy, just add up the numbers and divide by how many set of numbers there is.