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Lina20 [59]
3 years ago
9

It is expected that 563 quadrillion thermal units of Btu (British thermal units) of energy will be

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
3 0

Answer:

the expected rate of change in consumption is 11.83

Step-by-step explanation:

The computation of the expected rate of change in consumption is shown below:

= (Expected quadrillion thermal units - 2003 quadrillion thermal units) ÷ (difference in years)

= (563 - 421) ÷ (2015 - 2003)

= 142 ÷ 12

= 11.83

hence, the expected rate of change in consumption is 11.83

We simply applied the above formula so that the correct value could come

And, the same is to be considered

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A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound trai
Ksju [112]
Recall your d = rt, distance = rate * time.

if, the southbound train is going at a speed of say " r " mph, since we know that the northbound one is going faster by 4 miles, than is really going at " r + 4 " mph then.

now, we know in 2.5 hours, they're 330 miles from each other, thus the southbound train has been rolling for 2.5 hours, and the northbound train has also been rolling for 2.5 hours.

if the northbound train has covered on those 2.5 hours say " d " miles, then the southbound train has covered the slack, or " 330 - d ".

\bf \begin{array}{lccclll}
&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{t}\\
&------&------&------\\
Northbound&d&r+4&2.5\\
Southbound&330-d&r&2.5
\end{array}
\\\\\\
\begin{cases}
\boxed{d}=2.5(r+4)\\
330-d=2.5r\\
----------\\
330-\boxed{2.5(r+4)}=2.5r
\end{cases}
\\\\\\
330-2.5r-10=2.5r\implies 320=5r\implies \cfrac{320}{5}=r\implies 64=r

how fast is the northbound going?  well, r + 4.
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3 years ago
TanX = 7/11<br> find the value of x
Oduvanchick [21]

Answer: x=32.42707 degrees

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Step-by-step explanation:

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If I’m asked to simplify an expression does that mean I shorten it or solve it?
DochEvi [55]

Answer:

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Step-by-step explanation:

When you're asked to simplify an expression it means to solve it.

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Ivan

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Step-by-step explanation:

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The speed of light is estimated at 186,000 miles per second rounded to the nearest thousand miles per second.
Sedbober [7]

It was rounding to the nearest THOUSAND.


We are looking at the thousands place, keep that in mind.


Remember: everything 5 and above is rounded up, everything below 5 is rounded down.


186,789 is above 500, it is rounded to 187,000


186,899 is above 500, it is rounded to 187,000


185,990 is above 500, it is rounded to 186,000


and 185,190 is below 500, it is rounded to 185,000


Only one matches the criteria of the question:


185,990 is above 500, it is rounded to 186,000


therefore the answer is 185,990 miles per second



Have a fantastic day!


Read more on Brainly.com - brainly.com/question/10945335#readmore

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