Winnie used her calculator to calculate the square root of a number. She then found

the square root of the number displayed.

The calculator then showed 3. What

number did Winnie first enter into her

calculator? Explain your reasoning.

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.