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KatRina [158]
3 years ago
10

A skateboard for $62.80 at 6% sales tax

Mathematics
1 answer:
Sidana [21]3 years ago
6 0
Sales tax is:
$62.80* (6/100)= $3.77

$62.80+ $3.77= $66.57

The cost of the skateboard including sales tax is $66.57~
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How to solve the problem
lawyer [7]

Answer:

1440

Explanation:

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Use four rectangles to estimate the area between the graph of the function f(x) = V3x + 5 and the x-axis on the interval[0, 4] u
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Answer:

  12.123

Step-by-step explanation:

You want the area under the curve f(x) = √(3x+5) on the interval [0, 4] estimated using the left sum and four subintervals.

<h3>Riemann sum</h3>

When the interval [0, 4] is divided into four equal parts, each has unit width. That means the area of the rectangle defined by the curve and the interval width will be equal to the value of the curve at the left end of the interval.

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As the attachment shows, that sum is ...

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__

<em>Additional comment</em>

The table values in the attachment are rounded to 7 decimal places. Trailing zeros are not shown. Actual values used have 12 significant digits, as the total shows.

Such a sum is called a Riemann sum, named for a German mathematician. Four such sums are commonly used, and further refinements are possible. Those are the left sum (as here), the right sum, the midpoint sum, and a sum using a trapezoidal approximation of the rectangle area.

For left, right, and midpoint sums, n function values are required for n subintervals. When the trapezoidal approximation is used, n+1 function values are required.

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1 year ago
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2 years ago
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