When Javier and his father went to dinner, the bill was $34. If they tipped the waiter 20%, how much did they spend in total?

Not sure if this is right, but I got $40.8.

Step-by-step explanation:

I first turned 20% into a decimal. (0.20).

Then I multiplied 0.20 and 34 which is 6.8.

I then added 34 since it's the original cost to 6.8 since that's the tip amount.

After that, you should get $40.8.

I believe the answer is $40.8