Final answer:
To determine the total cost of the tablet, calculate the sales tax by converting the percentage to a decimal (0.07) and multiplying it by the item's cost ($85). Then, add the sales tax ($5.95) to the original price, resulting in a total cost of $90.95.
Step-by-step explanation:
The subject of this question is Mathematics, specifically pertaining to the calculation of sales tax in a real-world context. Assuming Michelle's tablet costs $85 and the sales-tax rate is 7%, to find the total cost of the tablet, we first need to calculate the amount of sales tax she would pay.
To do that, convert the percentage to a decimal by dividing by 100 (7% becomes 0.07), and then multiply by the cost of the tablet:
$85 × 0.07 = $5.95
Next, add the sales tax to the original cost of the tablet to find the total cost:
$85 + $5.95 = $90.95
Therefore, the total cost of the tablet, including sales tax, is $90.95.