It says to give my answer to the nearest tenth. What does this mean ?
i got this : 14.8660...
so does it mean i round it to 15 ? or 14.9 ?
14.9 is correct.
In this number, 14.86, the 8 is in the tenths place. Since 6 is more than 5, you round up to 14.9.
* The direction each parabola opens
* The vertex of each parabola
y = x2 - 2x
y = -2x2 + 4x - 3
When a question asks for an answer to the nearest tenth, it means that you should round your answer to the first decimal place. In this case, you have the number 14.8660, which continues indefinitely. To round this number to the nearest tenth, you look at the number immediately to the right of the tenths place, which is the first digit after the decimal point.
Since the digit following the tenths place is 6, which is greater than or equal to 5, you round up. This means that you increase the value of the digit in the tenths place by 1.
Therefore, rounding 14.8660 to the nearest tenth, it becomes 14.9.