You are at the store with your friend's family and they are looking to buy a new refrigerator for their home. There are two options available that they are interested in buying. On one of them there is a sticker that says “Energy STAR Certified''. Below the sticker it says that this refrigerator is guaranteed to be at least 10% more energy efficient than non-energy star brands. How might you use your understanding of science to walk your friends' family through why this Energy STAR fridge is a better purchase for the environment?

It will take 83 days to recover the extra cost

Explanation:

To determine the length of time it will take to recover the extra cost, it will be logical that we compare the $200 extra cost to the total savings in running cost made for a year and covert this into days

The total savings in running cost is the cost savings per hour multiplied by the number of hours in a year.

The calculations are set below:

Savings in running cost per hour = $0.1

Total savings in a year = 365 days ×  $0.1 × 24 = $876

Extra cost of Energy Star refrigerator = $200

If total savings for a year is  $876 , then equivalent length of time to save $200 would be

Length of time = 200/876 × 365 days = 83 days

It will take 83 days to recover the extra cost

Explanation:

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.