The calculator shows the result that Luiza got after
evaluating the expression 9 (52+ 18) + 42. She checked
her work by rounding all of the values to the nearest ten and
comparing it to the calculator result. Which is true regarding
her estimate and the accuracy of her calculator result?

1.) The estimated result is 560, which suggests the
calculator is correct.

2.)The estimated result is 740, which suggests the
calculator is incorrect.

3.) The estimated result is 840, which suggests the
calculator is incorrect.

4.) The estimated result is 1,100, which suggests the
calculator is incorrect.