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Mathematics, 02.09.2019 15:30 maceyshaynee9507

Which technique did bonnie use in this situation?
bonnie had 3 items in her shopping cart: a football for $14.99, towel for $8.68, and hairbrush for $10.50. sales tax is 7.75%. bonnie figures the total cost will be about $39.
choose the answer.
a.
mental math
b.
estimation
c.
number sense.

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