Final answer:
To estimate the total cost of corned beef and smoked turkey, prices are rounded to the nearest tens and then added. A reasonable estimate might be either $7.50 or $7, depending on the precision of rounding.
Step-by-step explanation:
The subject in question is about estimating the total cost of corned beef and smoked turkey from a deli. Given that the corned beef costs $3.21 and the smoked turkey costs $4.29, a reasonable estimate for the total cost can be attained through rounding and adding these prices. To estimate, you might round $3.21 to $3.20 (or $3) and $4.29 to $4.30 (or $4), and then add them together. Using the initial rounding, the total estimated cost would be $3.20 + $4.30, which equals $7.50. Using the simpler rounding, it would be $3 + $4 which equals $7.
Since this problem is asking for a reasonable estimate rather than a precise calculation, the estimated total being looked for could either be the more precise $7.50, or the simpler estimate of $7.