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Westkost [7]
2 years ago
8

Volume and surface area question. show work pleaseee

Mathematics
1 answer:
Sever21 [200]2 years ago
4 0

Answer:

180 cm^3 can fit in the container will be your answer.

Step-by-step explanation:

Ok so... the equation is: 6 x 5 x 12 ÷ 2

Which will be 180.

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Find Sin (BAC+30) 80POINTS
Ann [662]

Answer:

\dfrac{2}{5}\sqrt{3}+\dfrac{3}{10}

Step-by-step explanation:

<u>Trigonometric Identities</u>

\sin (A \pm B)=\sin A \cos B \pm \cos A \sin B

<u>Trigonometric ratios</u>

\sf \sin(\theta)=\dfrac{O}{H}\quad\cos(\theta)=\dfrac{A}{H}\quad\tan(\theta)=\dfrac{O}{A}

where:

  • \theta is the angle
  • O is the side opposite the angle
  • A is the side adjacent the angle
  • H is the hypotenuse (the side opposite the right angle)

Using the trig ratio formulas for cosine and sine:

  • \cos (\angle BAC)=\dfrac{12}{20}
  • \sin (\angle BAC)=\dfrac{16}{20}

<u>Angles</u>

\sin (30^{\circ})=\dfrac{1}{2}

\cos (30^{\circ})=\dfrac{\sqrt{3}}{2}

Therefore, using the trig identities and ratios:

\begin{aligned}\sin (\angle BAC + 30^{\circ}) & = \sin (\angle BAC) \cos (30^{\circ})+\cos (\angle BAC) \sin (30^{\circ})\\\\& = \dfrac{16}{20} \cdot \dfrac{\sqrt{3}}{2} + \dfrac{12}{20} \cdot \dfrac{1}{2}\\\\& = \dfrac{16}{40}\sqrt{3}+\dfrac{12}{40}\\\\& = \dfrac{2}{5}\sqrt{3}+\dfrac{3}{10}\end{aligned}

3 0
1 year ago
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A fish tank is in the shape of a cuboid.
zalisa [80]

Answer:

Length = 0.8m

Breadth = 0.3m

Volume = 108litres = 108÷1000 = 0.108m³

Volume = l x b x h

0.108 = 0.8 x 0.3 x h

0.108 ÷ ( 0.8 x 0.3 ) = h

0.45 = h

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Determine the formula, in terms of x, that best describes the area of the plot.​
liq [111]

The area of a plot is the amount of space on the plot

The area of the plot is 2x^2 -x - 1

<h3>How to determine the area</h3>

The dimensions of the plot are given as:

Length=2x+1

Width=x-1.

The area of the plot is the product of its dimension.

So, we have:

Area = (2x + 1)(x - 1)

Expand

Area = 2x^2 - 2x + x - 1

Evaluate the like terms

Area = 2x^2 -x - 1

Hence, the area of the plot is 2x^2 -x - 1

Read more about areas at:

brainly.com/question/24487155

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What percentage of Americans would you predict wear contact lenses?​
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About 11% of Americans wear contacts!
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Answer:

The value of the missing angle is 103.

Step-by-step explanation:

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