Answer:
The best measure of center for this dot plot is the median.
Choice A
Step-by-step explanation:
measures of center or location of a data set include;
the mean
the mode
the median
If a data set is symmetric or approximately normal then the best measure of center is the mean. On the other hand, for an asymmetric data with outliers the best measure of center is the median since it is robust to outliers.
Three times the radius means 
5 units less than this means that you have to subtract 5 from this quantity, and you have 
I don't think that makes sence?.. maybe it is just me so sorry
Legit way is vertex form
easy way is this
x value of vertex in form
f(x)=ax^2+bx+c is -b/2a
the y value is f(x value of vertex)
so
p(x)=-0.5x^2+40x-300
x value of vertex is -40/(2*-0.5)=-40/-1=40
max profit selling 40 per week
profit would be 500
