For a display, identical cubic boxes are stacked in square layers. each layer consists of cubic boxes arranged in rows that form a square, and each layer has 1 fewer row and 1 fewer box in each remaining row than the layer directly below it. if the bottom of the layer has 81 boxes and the top of the layer has only 1 box, how many boxes are in display?
a. 236
b. 260
c. 269
d. 276
e. 285

E. 285

Step-by-step explanation:

The display forms a pyramid with each layer having a square based with one fewer row and one fewer column than the previous layer.

Since the first layer has 81 boxes, it is a 9x9 square. The next layer is an 8x8 square, followed by a 7x7 and so on.

Therefore, the total number of boxes is:

There are 285 boxes in display.

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

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 !