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2 answers:
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To find the area of a prism, you calculate the area of the cross-section and multiply that number by the length. The cross-section of this prism is a trapezium, and the formula for this is 
.
Insert your given numbers to find out the area of this prism's cross-section:
Now, multiply 90 by the length, 10cm, to find out the volume of the prism;
90×10=900cm³
Therefore, your answer id the third option.
Insert your given numbers to find out the area of this prism's cross-section:
Now, multiply 90 by the length, 10cm, to find out the volume of the prism;
90×10=900cm³
Therefore, your answer id the third option.
Answer:
Step-by-step explanation:
Well to start with there is a vertex formula which is ,
Your initial equation is where
. So you would plug in your numbers
we know know that
so plug in h in
which would be (-2)^2+4(-2)+8 = 4-8+8 = 4 which would make the vertex