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aleksley [76]
3 years ago
15

The new dolphin tank at the aquarium has a radius of 75 feet and a height of 20 feet. What is the volume of the dolphin tank? Ro

und to the nearest tenth. Use 3.14 for pie
Mathematics
1 answer:
stiks02 [169]3 years ago
7 0
<span>I got 353250 as the correct answer.</span>
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noname [10]

Answer:

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Step-by-step explanation:

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3 years ago
Two more than 16 times a number is the same as 21 less than the product of -7 and the number
slava [35]

Answer:

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Step-by-step explanation:

<u>Let the number be x, and we have equation:</u>

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3 years ago
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Two passenger train, A and B, 450 km apart, star to move toward each other at the same time and meet after 2hours.
likoan [24]

Let v be the speed of train A, and let's set the origin in the initial position of train A. The equations of motion are

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where s_A,\ s_B are the positions of trains A and B respectively, and t is the time in hours.

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\begin{cases}s_A(2) = 2v\\s_B(2) = -\dfrac{16}{7}v+450\end{cases}\implies 2v = -\dfrac{16}{7}v+450

Solving this equation for v we have

2v = -\dfrac{16}{7}v+450 \iff \dfrac{30}{7}v=450 \iff v=\dfrac{450\cdot 7}{30} = 105

So, train A is travelling at 105 km/h. This implies that train B travels at

105\cdot \dfrac{8}{7} = 15\cdot 8=120 \text{ km/h}

5 0
3 years ago
Help please simplify: 4(3b)
Aleonysh [2.5K]

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