Answer:
150 - 30x = 0
Step-by-step explanation:
150 is the number of cans at the beginning, 30 is the number of cans taken away each hour, x is the number of hours, 0 is when they are sold out
Answer:
1 day = 1440min
so 36min of a day = 36/1440 = 1/40
We know that
the equation of the parabola is of the form
y=ax²+bx+c
in this problem
y=1/4x²−x+3
where
a=1/4
b=-1
c=3
the coordinates of the focus are
(-b/2a,(1-D)/4a)
where D is the discriminant b²-4ac
D=(-1)²-4*(1/4)*3-----> D=1-3---> D=-2
therefore
x coordinate of the focus
-b/2a----> 1/[2*(-1/4)]----> 2
y coordinate of the focus
(1-D)/4a------> (1+2)/(4/4)---> 3
the coordinates of the focus are (2,3)
The mountain bike cost $189 after both discounts
