Answer:
The mean is 20
Step-by-step explanation:
17+19+21+23=80
80 div 4 = 20
the 20x(8+2) is just two times greater as its 200 instead of 100 which is the other answer
(3a²+6ab-24²)= 3a(a+2b)x(4b)
You already have figured the main idea. In this case, the population is growing 1.9% a year. This word can be translated into: multiplied by 101.9% (100+1.9%). That means the P0 is 6 bill, the base is 101.9%(or 1.019) and the time is 50 years. The calculation would be:
<span>P(t)=P₀a^t
</span>P(t)=6 billion * 101.9%^50= 6 billion * <span>2.56276= 15.38 billion</span><span>
</span>
Subtract the 17190 from the 21840. you get 4650. 4650 divided by 21840 is 0.21. The percent decrease is 21%
