3. What happens if there are more births than deaths in a country?

Natural increase in a population occurs where Birth rate is greater than death rate. That is, that there are more births than deaths in that population ion a year. Natural decrease occurs when death rate is greater than birth rate.

Explanation:

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Natural increase in a population occurs where the Birth rate is greater than the death rate. That is, that there are more births than deaths in that population in a year.  The Natural decrease occurs when the death rate is greater than the birth rate.

Explanation:

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

c is the answer : )               your welcome