Question

suppose the sales tax rate in your area is 7.5%. complete the explanation of how to determine the total cost, including tax, of an e - reader that costs $105. round to the nearest cent if necessary. (select) $105 by the tax rate expressed as a decimal (0.075) and add the result to $105. or, (select) $105 by the sum of (select). the total cost is $ (select) divide multiply

Explanation:

Step1: Calculate tax amount

Multiply the cost of e - reader by tax rate in decimal form. The tax rate is $7.5\%=0.075$, and the cost of e - reader is $105$. So the tax amount is $105\times0.075$.
$105\times0.075 = 7.875$

Step2: Calculate total cost

Add the tax amount to the original cost of e - reader.
$105 + 7.875=112.875\approx112.88$

Another way:
The total cost is the original cost times $(1 + 0.075)$. That is, we multiply $105$ by $1.075$.
$105\times1.075 = 112.875\approx112.88$

Answer:

Multiply; multiply; $1$ and $0.075$; $112.88$