A department store buys 100 shirts at a cost of $700 and sells them at a selling price of $10 each. Find the percent markup

30%

Step-by-step explanation:

The price for each shirt to buy is: $ 700/100 = $ 7 / each

Selling price is: $ 10 / each

So the difference between the selling and buying prices is: $ 10 - $ 7 = $ 3

So 100 each, the interest is: $ 3 X100 = $ 300 => 30%

the population of other specie of birds will decline or other specie of birds will find some alternate source of food to survive.

explanation:

according to the competitive exclusion principle, which is also known as gause's law, two specie living in the same niche and feeding on the same resource cannot co-exist stably.

as we have well studied the theory of natural selection which states that only those organisms survive which have better tendency to compete for food and adapt to the environmental conditions.

coming towards the question, what wi ll happen when one species outcompetes the other for the small fish , the other specie will not get enough food and will start to die or decline in population. eventually either other specie needs to find another alternative food source for itself or migrate at some other location where there is less competition otherwise it will just not exist anymore at that niche.

hope it !