Start by finding the vertex, which is the point the parabola turns. The x value is -b/2a, which you have in your notes here. b = -8 and a = 2 and therefore the x value of the vertex is 2. Plug that in to find the y value, which is -2.
Start by plotting this point and the y intercept, which is 6. The parabola will be a U shape, which goes upwards starting at the vertex. If you draw that using the side with the y intercept, you can just mirror it on the other side of the vertex.
The formula is
SA= pi (r)2 +pi (r) (h)
the SA is 13,188
Answer:
a) 
b)
c)1945 > 45
d) 1921 >5/7, 13/14
Step-by-step explanation:
a) 56 and 29/36
⇒ 56 > 0.80
or,
b) 5/12 and 3
⇒ 3 > 0.41
or,
c) 25 and 1945
Here, 1945 > 45
d) 5/7, 13/14, and 1921
⇒ 1921 > 0.71 and 0.92
or, 1921 >5/7, 13/14
Nine hundred fifty four thousandths
