Question

A number,x, rounded to 1 significant figure is 40 write down the error interval for x

Answer 1

Error interval is
`35\leq x< 45`

Explanation:

Given: A number x becomes 40 if it is rounded to 1 significant figure

To find: error interval for x

Solution:

In the given question, an error interval is the range of values that a number x can be equal to before it is rounded to 1 significant figure.

As a number x becomes 40 if it is rounded to 1 significant figure, error interval is
`35\leq x< 45`.

A number x in this interval becomes equal to 40 if it is rounded to 1 significant figure.