Amarine biologist wants to determine the impact of warming oceans on the coral in great barrier reef. which option below best describes the population he will study?
all the oceans in the world
only the ocean in which the great barrier reef is found
coral in all the oceans of the world
only coral found in the great barrier reef

The marine biologist is obviously interested in the coral in the Great Barrier Reef - so studying other corals could introduce confusing data, therefore he or she will want to study

Only coral found in the Great Barrier Reef.

It can be assumed here that the ocean is not the target of the examination, because what is studied is the effect of the ocean warming up,to we can assume that this effect is already known

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )