A number, x, rounded to 1 decimal place is 3.7
Write down the error interval for x.

Step-by-step explanation:

The error in rounding a number is half of the unit of measure.

The number was rounded to the nearest 0.1 unit so the error is 1/2×0.1, which equals 0.05.

Now we add 3.7 and 0.05, which equals 3.75 and we also take 3.7 - 0.05, which equals 3.65

So, the error interval is:

$15 each

step-by-step explanation:

$45/3 children= $15 each