Answer:
C. HGTV
Explanation:
A job can help you pay the bills, etc and can help develop good character and other attributes and life lessons. College can help you in multiple ways for preparing you and in finding which path is being taken towards your future. The IPad can help you with many things such as wanting to take a break and listen to music, or it can be used in a more efficient way by allowing you to research and study, which would become helpful if you are planning to go to college. The HGTV is kinda pointless, for you can just watch something on your IPad or do much more on it for it has multiple functions. You could use the money for something way more important or useful. Therefore, the HGTV is the opportunity cost.
Answer:
they would become more expensive
The two most commonly format styles are MLA and APA format.
By using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
<h3>Efficiency of a machine</h3>
- Efficiency is the percent of work put into a machine (input work) to that of the work done by the machine (output work).
- Efficiency of a machine is always less than 100% because the output work is always less than the input work because some of the input work is used to overcome friction.
Efficiency = work output/work input * 100%
Efficiency of fireplaces = 15%
Amount of food required to heat a room to 20°C = 15 kg
Assuming efficiency of 100%, amount of wood required will be X kg:
X = 15% * 15 kg
X = 2.25 Kg
By switching to woodstoves which are 75% efficient, amount of wood required will be Y kg:
Y = 2.25 kg / 75%
Y = 3 kg
Therefore, by using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
Learn more about efficiency of machines at: brainly.com/question/3617034