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MA_775_DIABLO [31]
2 years ago
8

Part A: The sun produces 3.9 • 1033 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 2

.45 • 105 seconds? (5 points) Part B: Which is the more reasonable measurement of the distance between the tracks on a DVD: 7.4 • 10–4 mm or 7.4 • 104 mm? Justify your answer.
Mathematics
1 answer:
pickupchik [31]2 years ago
5 0

A perfect situation to use a proportion:

                      (3.9 x 10³³) / 1  =  X / (2.45 x 10⁵)  .

Solve that proportion for ' X ' in the usual way.
If you can't remember how to solve a proportion, then
THAT's what you have to go look up.  It's much more
important to you right now than how much energy the
sun is putting out.


7.4 x 10⁴ mm is the same size as about 243 feet !
If the tracks on a DVD were that far apart, there would not be
room for very many tracks on a DVD.  That's not reasonable.

If the tracks are  7.4 x 10⁻⁴ mm apart, then there are about
34,000 tracks in a stripe that's 1-inch wide.  I have no idea
how they do this, but it's certainly more reasonable than the
other choice.
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The table below shows the typical hours worked by employees at a company. A salaried employee makes $78,000 per year. Hourly emp
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Given:

  • The table of typical hours worked by employees at a company
  • salaried employee makes $78,000 per year
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To Find: Which payment option to recommend to a new employee.

Solution: I would recommend being a salaried employee.

Explanation:

We begin by calculating the typical number of hours worked per week.

Adding up the hours from the table, we have 0+8+8.5+9.5+10+8+3=47.

The payment for an hourly employee must be calculated as $26 per hour for working till 40 hours, and $39 per hour when they work more than 40 hours.

So, the payment for 47 hours of work per week will be (26)(40) + (39)(7) = 1313 dollars.

As there are 52 weeks in a year, the yearly payment for an hourly emplyee would be (1313)(52) = 68276. That is, an hourly employee would earn $68276.

On the other hand, we are given that a salaried employee makes $78000 per year which is more money than what an hourly employee makes for the same amount of work.

Therefore, I would recommend a new emplyee to be paid a salary rather than work on an hourly basis.


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2 years ago
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Answer:

Riley divided the number of petunia seeds by the number of begonia seeds, getting \frac {5}{15} = \frac {1}{3}. What you actually need to do to calculate the probability of selecting a petunia seed is divide the number of petunia seeds by the <em>total</em> number of seeds. 5 petunia seeds and 15 begonia seeds makes 20 total seeds, so you divide 5 petunia seeds by 20 total seeds to get \frac {5}{20} = \frac {1}{4}.

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