$12.98 is how much sales tax there will be
Given expression: 
In order to simplify it to get an equivalent expression, we need to multiply all terms.
Let us simplify 
Therefore, 

=
.
<h3>Therefore,

is equivalent to

</h3>
Answer:
The dimensions are 18 * 18 * 36in
Step-by-step explanation:
Let the lengths of the square ends be x in and the length be y in.
Then the maximum length + girth
= 4x + y = 108in
The volume V = x^2y.
From the first equation:
y = 108 - 4x
so V = x^2(108 - 4x)
= 108x^2 - 4x^3
Finding the derivative:
V' = 216x - 12x^2 = 0 ( for a maximum volume).
12x( 18 - x) = 0
x = 18
So the value for x for a maximum volume = 18 in
This gives y = 108 - 4(18) = 36 in.
Speed = distance / time
speed = 250/5
speed = 50 mph <===