using the law of sines, you can say that f=28 units. Hope this helps
Answer:
yard
Step-by-step explanation:
Length of string Mrs. Ruiz has =
yard
Mrs. Ruiz needs to hang 3 banners using the string.
Having known that each banner uses same length of string to be hung we can divide total length of sting into 3 equal parts.
So, we can divide
yard by 3 as
⇒ 
Changing the division sing to multiplication by taking reciprocal of divisor.
⇒ 
We can now multiply numerators and denominators.
⇒
yard
∴ Mrs. Ruiz must used
yard of string for each banner.
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