42 bundles using a 10% waste factor and assuming you have the easiest of easy roofs to replace. You'll also need underlayments, Ice & Water shield in some areas, proper venting(1 vent per 375/sq ft) and various other accessories
Answer: There are 6045 millions world population during the period of 1950 to 2000.
Step-by-step explanation:
Since we have given that
The world population in the second half of the 20 the century by the equation:

We need to find the average world population during the period of 1950 to 2000.
So, there are 50 years between 1950 to 2000.
So, t = 50 years.
Therefore, the average population would be

Hence, there are 6045 millions world population during the period of 1950 to 2000.
A = 11 and b = 8 I’m pretty sure brosky
Comment
You can do this a number of ways.
The first way is to set up a proportion. That's very formal, and is most respected.
Proportion.
x / 60 = 1 / 10 The proportion is reduced by a factor of 10. Cross Multiply.
10 * x = 60 * 1
10x = 60 Divide by 10
x = 60/10
x = 6
Multiply by the scale factor.
Beginning number * scale factor = Final result.
60 * 1/10 = Final Result
60 * 1 / 10 = Final Result
Final Result = 6
This method words even when the numbers are quite complicated.
If a divides c,
then 'a' is a factor of 'c'.
Also,
If 'b' divides c,
then 'b' is also a factor of 'c'
therefore,
'a' and 'b' are factors of 'c'
Hence, a and b divides 'c'
so, c = a*b
and ab will also divide c.
Hence, proved.