Keith wants to buy an address book that costs $5.00, but he has only $1.25 in his budget. what is his budget deficit?

 Keith's budget deficit by $3.75.

Step-by-step explanation:  Given that Keith wants to buy an address book that costs $5.00, but he has only $1.25 in his budget.

We are to calculate the deficiency in his budget.

Cost price of the book = $5.00.

And, Keith's budget = $1.25.

So, the cost of the book is greater than Keith's budget.

Therefore, the deficiency in Keith's budget is given by

Thus, Keith's budget deficit by $3.75.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

16 would be your answer