Answer:
-2 is the biggest number because in the negatives the bigger number us always the smaller one.
A. 0.5 well at least that's the answer in ingenuity.<span />
10 1/2 = 21/2
(21/2) / 3
= 21/2 x 1/3
= 21/6
= 3 1/2
answer
3 1/2 pages
By the law of cosines, the angle

satisfies

which reduces to

which converts to approximately 77 degrees (this can be done my multiplying by 180 and dividing by pi).
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