Answer:
9.09%
Step-by-step explanation:
To find percent decrease you have to use this equation:

Initial = 49.5
New = 45
Plug in and solve:

The percent decrease is 9.09%
<em>Hope this helps!!</em>
<em>- Kay :)</em>
Answer:
1.97-20= -18.03
20-1.97= 18.03
Step-by-step explanation:subtract the numbers from each other.
You have to times it by 100 - however much you want to decrease it by so your multiplier would 0.38
When x=0 y=50 when y=0 x=+\-5. -x^2 makes the parabola open downward y(x)=2x^2+50;y(3)=2*9+50=32