<span>A.) y = 0.3(2)x
These are exponential decay</span>
1.2 e⁻¹¹
Because you need a number between 1 and 10 for scientific notation. So you move the decimal over 11 places. Since you move it to the right, it becomes a negative exponent.
Answer:
The amount of flour Mrs.Stewart needs for 5 cups of shortening
cups.
Step-by-step explanation:
Mrs.Stewart pie dough needs
cups of shortening for
cups of flour.
Now we assume that the shortening needed for
cups of flour is
cups.
Accordingly we can arrange the ratios.
So for one cup of shortening how many cups of flour is needed we have to use the unitary method:

Plugging the value of
as it is number of cups of shortening Mrs.Stewart have used.
And multiplying both sides with
.
Number of cups of flour needed when
cups of shortenings are used
.
So, 
The amount of floor Mrs.Stewart needed for
cups of shortening
cups of floor.
We have that (x) + (x+2) + (x+4) = 126 so 3x + 6 = 126 can be used to find the first integer.
3x + 6 = 126
3x = 120
x = 40
The numbers are 40, 42, 44
I used the completing the square method to get the (x+2)^2. The final line is in standard form.