While in Europe, if you drive 109 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 22.0 mi/gal ? Assume that 1euro=1.26dollars.

The amount is

Explanation:

From the question we are told that

     The  distance traveled per day is  

    The  cost of one liter is  

     The car's  gas mileage is  

Generally the amount of distance covered in one week is evaluated as

The  amount of gas used in one week by the car is mathematically represented as  

=>    

=>      

converting to liters

Thus the amount spent on gas in one week is  

=>      

=>      

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.