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Answer:
9 inches of rainfall produces the maximum number of gnats.
Step-by-step explanation:
Given : 
To Find :How many inches of rainfall produces the maximum number of gnats?
Solution:

G(x) =The number of gnats in millions.
x denotes the length of rainfall
To Find the maximum length find the mid point of zeroes .Since parabolas are symmetrical, the x value of the max falls 1/2 way between the zeros.



So, x = 0 , x= 18
Now Formula of midpoint : 


Hence 9 inches of rainfall produces the maximum number of gnats.
Answer:

Step-by-step explanation:
Notice when x increases 1, y is 4 times the previous one, so
the function is like 
To determine the constant C, put any pair of (x, y)
Use x = 0, y = 0.2, so
0.2 =
= C * 1 = C
then 
Answer:
You can use graphing to determing whether (5, 2) is a solution to the system of inequalities by creating a line going from the origin (0,0) and bring the line to (5, 2). Using this, you can find the x & y intercept, slope, etc.
Step-by-step explanation:
Answer:
i think its .625
Step-by-step explanation:
all you need to do to make a fraction into a decimal is divide the nominator by the denominator