R=fixed rate
m=rate of miles
n= miless
T(n)=total amount per miles(n)
T (n) =mn+r
Answer:
See below
Step-by-step explanation:
<u>Zeroes</u>



and 
and 
<u>Axis of Symmetry</u>










<u>Vertex</u>



<u>Y-intercept</u>






Please review the attached graph for a visual of these key features.
We have that The height changing rate when the length of the base is 2 cm

From the question we are told
The diagonal of a rectangle, with base x, remains at a fixed value of 3cm. If the base is increasing at a rate of 8 cm/s. at what rate is the height changing when the length of the base is 2 cm?
Generally the Pythagoras equation for the triangle is mathematically given
as

With r=3
Therefore
dx/dt=8cm/s
Hence

We have

Therefore
The height changing rate when the length of the base is 2 cm

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Step-by-step explanation:
79×0.08 = 6.32 (tax)
79(price) + 6.32(tax) = 85.32