Answer: -93.5
Step-by-step explanation:
Average of the two -94+-93/2= -93.5 so thats the midpoint
The initial value is 309.35
It means that in the year 2010 (starting year) the population was 309,350,000 people or written another way "309.35 million". The second way is more short so probably the more preferred method.
To find the value 309.35, simply look at the table under the value t = 0.
Answer:

Step-by-step explanation:
zeroes are when you plug in that x value and get y=0
therefore if you set x = that number and solve for 0 you get a "function"
multiplying these together will yield the complete 3rd degree polynomial
x = 1
x-1=0
x=7
x-7=0
x=-4
x+4=0

If needed you could expand but I'm too lazy