Is this a multiple choice question? If so what are the options?
My guess is 21
81 inches converted to feet is 6.75 feet
960 cups of alcohol (or 60 gallons)
360 gallons of water
240 cups of ammonia (or 15 gallons)
Take total and divide by 8 , so 1280 divide by 8 is 160. now multiply each amount by 160. *(remember there are 16 cups in a gallon . So you dived total amount of cups by 16 to convert it to gallons)
Step-by-step explanation:
the answer would be 40 4x 10x h = 4x
Going by 30 for east and -30 for west