Answer:
$28.9
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Answer:

Step-by-step explanation:
Given



Required
Solve for x
Since B is in between both points, then:

This gives


Divide by 3

Part A:
y=mx+b
621=83(7)+b
Part B:
621=83(7)+b
621=581+b
621-581=b
b=40
Insurance cost is 40$
Kilograms per cubic centimeter