IV. Fill in each blank with the correct to-infinitive below.

to make to track to reduce to provide to ensure

26. An alternative current with high voltage levels is used _____________ power loss across great distances.

27. The first hydro-electric power plant was built in Niagara Falls in 1895 by Nikola Tesla and George Westinghouse _____________ the beginning of electrification of the world.

28. Invented by Casio in 1957, the electronic calculator is used _____________ math classes much easier.

29. A powdered zinc gel anode is used for the alkaline dry cell battery _____________ more power.

30. A Fitbit Flex is used _____________ your steps, distance traveled, calories burned and, depending on the brand, your sleep patterns.