Question

there are many options for a new cell phone in the market and several different companies to choose from. you visit two shops to learn about their prices, and check with your friends about their cell phone plans.
after comparing some new cell phones, you decide to buy a cell phone from a popular brand for $799.99. its in the mid - price range, and it seems like a good - quality phone that will last several years. the sales tax hasnt been included yet, and the sales tax rate in your state is 7.24 percent.
whats the total cost of your new phone, including sales tax?
$857.91
$1,379.18
$742.07
$819.19

Explanation:

Step1: Calculate the sales tax amount

The formula for calculating the sales tax amount is \( \text{Sales Tax Amount}=\text{Price of the item}\times\text{Sales Tax Rate}\).
The price of the cell - phone is \(P = 799.99\) and the sales tax rate \(r=7.24\%=0.0724\).
So, the sales tax amount \(T = 799.99\times0.0724\)

$$
LATEXBLOCK0
$$

Step2: Calculate the total cost

The total cost \(C\) of the cell - phone is the sum of the price of the cell - phone and the sales tax amount.
\(C=P + T\)
Substitute \(P = 799.99\) and \(T\approx57.92\) into the formula.
\(C=799.99+57.92=857.91\)

Answer:

A. \(\$857.91\)