Here....
The length is given 15 feet and the width is 12 feet...Now let's find the Perimeter..
- The formula to calculate Perimeter of rectangle is 2 ( l + b )
Perimeter = 2 ( l + b )
= 2 ( 15 + 12 )
= 2 × 27
= 54 feet

:)...
A constant is a number that never changes value. Example:
x + 3 = 5, 3 and 5 are constants.
I would assume so since it is a repeating decimal.
Answer:

Step-by-step explanation:
Since the country wants to reduce the emission by the percentage each year, the function will be decaying function. The formula of decaying function will look like this

Where
E(t) = the number of emission after t years
E0= the number of initial emission= 40 million tons
r=rate of growth/decay = 35%= 0.35
t= time in years
If we put the number, the equation will be:

I do A and B but that is the way I learned it. Hope this helps :)