Answer:
Step-by-step explanation:
Length of:
First piece = x
Second piece = 4x
Third piece = 5x
Equation: 30 = 4x + 5x + x
Solving the Equation:
10x = 30
x = 3
Lengths of:
First piece = 3 inches
Second piece = 12 inches
Third piece = 15 inches
Answer:

Step-by-step explanation:

Expand brackets.


Apply radical rule : 


5p + 2,000,000 = 22,500,000
5p = 20,500,000
p = 20,500,000/5
p = 4,100,000 population in 1950
The answer to your question is -2.
You will need to use formula x= -b/2a because the min value will by the vertex of function.
x= -(-92/(2*.2)) = 230
then plug in x value
C=0.2(230)^2-92(230)+11,165= 585