Answer:
628.32
Step-by-step explanation:
Volume of a cone = 1/3 π r² h
1. A
2. D
not so sure about the last one
Convert to vertex form
or easier
for y=ax²+bx+c
the x value of the vertex is

and the y value is found by subsituting the x value in for x
so
y=1x²+4x+11
a=1
b=4
the x value of the vertex is

the y value is found by subsituting -2 for x
y=(-2)²+4(-2)+11
y=4-8+11
y=7
the vertex is (-2,7)
Answer:
dont know
Step-by-step explanation:
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