let's bear in mind that a year has 12 months, so 30 months is really 30/12 years.

Answer:
Here is your answer in the picture..
Answer:
Y = -10X - 5
Step-by-step explanation:
Y = mX + b
m - slope
b - y - intercept.
Answer:
3768
Step-by-step explanation:
The question is asking for the volume of the "cylinder" straw.
1cm = 10mm
30cm = 300mm
Volume of a cylinder = 
The radius is half of the diameter = 4/2 = 2
Radius squared is 4
Height is 300mm
1200mm * 3.14 = 3768
I am not very sure, since I am not that familiar with cylinders. Sorry if this is wrong.
Hope this helps :)
Have a great day!