$\"\"$

The average speed of the truck while going is $\"\"$ mph.

The average speed of the truck while returning is $\"\"$ mph.

The average speed for the total trip is $\"\"$ mph.

Distance to be travel by the truck to reach the city is $\"\"$ miles.

Total Distance traveled by the truck is $\"\"$ .

$\"\"$ .

The time taken by the truck to reach the city is $\"\"$ .

The time taken by the truck while returning back from the city is $\"\"$ . $\"\"$

The total time taken by the truck is $\"\"$ .

$\"\"$

Multiply each side by $\"\"$ .

$\"\"$

The domain of function is all possible values of $\"\"$ .

Denominator of the function should not be zero.

$\"\"$

$\"\"$ .

The Domain is $\"\"$ .

$\"\"$

(b)

Draw the table for different values.

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	\ $\"\"$ \

Observe the table

The $\"\"$ comes closer to $\"\"$ , the value of $\"\"$ becomes very large.

$\"\"$

(c)

$\"\"$

As $\"\"$ tends to $\"\"$ from the right hand side, the function approaches to $\"\"$ . $\"\"$ .

$\"\"$

(a)

$\"\"$ .

Domain is $\"\"$

(b)

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	\ $\"\"$ \