during A catered lunch an average of 4 cups of tea are poured per minute .The lunch will last two hours. How many gallons of tea should the caterer bring if there are 16 cups in 1 gallon

30 gallons

Step-by-step explanation:

One hour has 60 minutes, thus, two hours have 60*2 = 120 minutes.

If 4 cups are poured per minute, in 120 minutes, the number of poured cups is:

4*120 = 480 cups.

In 2 hours they pour 480 cups.

We need the answer in gallons:

Since 16 cups are equivalent to 1 gallon, we divide the 480 cups by 16 to find the number of gallons:

480/16 = 30 gallons

⇒480 cups are equivalent to 30 gallons

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.