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Juli2301 [7.4K]
3 years ago
10

If r = 12 units and x = 15 units, then what is the volume of the cylinder shown above A. 8640 π cubic units B. 2160π cubic units

C. 180π cubic units D. 648π cubic un

Mathematics
1 answer:
ZanzabumX [31]3 years ago
5 0
2160 /pi cubic units
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The feet of a commemorative parabolic steel arch 100m high are 200m apart. Determine whether the focus of the arch is above or b
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<span>First of all, there should be coherence for the units of measurement -- either they are all meters or they are all ft. I would assume they are all ft. The correct answer is 75 ft above. T The explanation is the following: suppose the ground level is the x-axis, the 2 feet of the arch lie respectively on (0,0) and (100,0) on the ground level. Since the arch is 100ft high, the vertex of the parabola will be the point (100,100). Thus, we can find the equation describing the parabola by putting the three points we know in a system and we find that the equation of the parabola is y=(-1/100)x^2+2 To find the focus F, we apply the formula for the focus of a vertical axis parabola, i.e. F(-b/2a;(1-b^2+4ac)/4a). By substituting a=-1/100, b=2 and c=0 into the formula, we find that the coordinates of the focus F are (100,75). So we conclude that the focus lies 75ft above ground.</span>
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The vertex form of a function is g(x) = (x - 3)2 + 9. How does the graph of g(x) compare to the graph of the function
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Its the second choice.

Step-by-step explanation:

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In a scale drawing, a building has a length of 15 cm. The actual length of the building is 37.5 feet. Whats the scale of the dra
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Answer:

\frac{15}{37.5}\ \frac{cm}{ft}

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we know that

The scale of the drawing is equal to divide the length of a building in the scale drawing by the actual length of a building

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\frac{15}{37.5}\ \frac{cm}{ft}

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1\ ft=30.48\ cm

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divide by 30.48

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