Chapter 6.4, Problem 3CYU

To determine

To write: The equation for relation between cost to the number of gallons of gasoline

and to find cost of $18.5$ gallons of gasoline.

Answer to Problem 3CYU

The equation is $C=3.19n$ dollars and Cost for $18.5$ gallons of gasoline. $=59.015\$$

Explanation of Solution

Given information:

Consider cost of $13$ gallons of gasoline is $\$41.47$ .

Calculation:

From the given data,

Cost of $1$ gallons of gasoline is $=\frac{41.47}{13}\$=3.19$ .

  $C=3.19n$ dollars.

C is the cost

And n is the number of gallons.

For,

  $\begin{array}{l}n=18.5\\ \Rightarrow C=3.19(18.\text{5)}\\ =59.015\end{array}$

Hence, equation is $C=3.19n$ dollars and Cost for $18.5$ gallons of gasoline. $=59.015\$$