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3 years ago

Brianna paid $13.77 for a new CD. The price includes a 6% sales tax. How much was the CD before the tax?

Mathematics

1 answer:

Lilit [14]3 years ago

8 0

$12.94 is what the CD would be before the 6% sales tax

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2 years ago

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Evaluate (-12)(-2)^2

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(-12)(-2)^2 = -48.

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Which of these trends represents an inverse variation?

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2 years ago

Find the surface area of the cylinder formed by the net. Use 3.14 for π.

sineoko [7]

Answer:

138.16 square feet

Step-by-step explanation:

The surface area of the cylinder consists of one rectangle and two circles.

1. The radius of the circle is 4 ft, then the area of the circle is

$A_{circle}=\pi r^2 =\pi \cdot 4^2 =16\pi \ ft^2$

2. The width of the rectangle is 1.5 ft, the length of the rectangle is the circumference of the circle.

Find the circumference:

$C=2\pi r=2\pi \cdot 4=8\pi \ ft$

Hence,

$A_{rectangle}=1.5\cdot 8\pi =12\pi \ ft^2$

3. The surface area of the cylinder is

$SA=2A_{circle}+A_{rectangle}=\\ \\=2\cdot 16\pi +12\pi =32\pi +12\pi =44\pi \approx \\ \\\approx 44\cdot 3.14=138.16\ ft^2$

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2 years ago