A donut shop owner spends $3 to make one dozen cinnamon rolls. He marks them up 500% to sell to customers. What is the price for one dozen cinnamon rolls?

The price for one dozen cinnamon rolls is $18.

Step-by-step explanation:

We are given the following in the question:

Money spend on making one dozen of cinnamon rolls = $3

Marked price = 500% of the making cost

We have to find the price for one dozen cinnamon rolls.

Marked Price =

Selling price = Marked price + Cost price

Thus, the price for one dozen cinnamon rolls is $18.

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.

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high