You can utilize the Pythagorean theorem expressed as a^2 + b^2 = c^2... if b is unknown, you can rearrange the formula. Hence, c^2 - a^2 = b^2. Squaring 47 gives 2209 and squaring 13 yields 169... Subtracting gives you 2209-169, which results in 2040. Taking the square root of that yields approximately 45.166359, which can be rounded to 45 or as 45.167 when expressed to two decimal places. I hope this helps!:)
1 product = $65.00
20 products = 65 x 20 = $1300
Sales Tax is 3.5% of $1300 = 0.035 x $1300 = $45.50
Grand total = $1300 + $45.50 = $1345.50
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Response: $1345.50
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