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If you are rounding to the nearest tenth
Let's say round 20.15 to the nearest tenth. 1 is the tenth place. You have to look at the hundredths place. Since it is 5 and over You round up. If it is under 4 then you round down to it would be 20.2
<h3>I think the answer is (a). </h3>
The parabola's line of symmetry is the x-axis.
A coordinate plane have good day sir!