y = sin(360) = sin(0) = 0
answer: y=0
You can use the graph by drawing a unit circle centered about the origin. Then find the point and the corresponding y value.
To find it, evaluate it at the endpoints and the vertex
in form
f(x)=ax²+bx+c
the x value of the vertex is -b/2a
given
c(t)=1t²-10t+76
x value of vertex is -(-10)/1=10
evaluate c(0) and c(13) and c(10)
c(0)=76
c(13)=115
c(10)=76
it reached minimum in 2000 and 2010
porbably teacher wants 2010
the min value is $76
It means that value is not counted. it’s there but you don’t include it
<span>(-45 + (-12) / 2 = -28.5
</span>So the answer is -28.5
