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yaroslaw [1]
1 year ago
9

A research submarine descends 65 meters per minutes to a depth of 4485 m, conducts experiments, and then ascends at a rate of 65

meters per minute to the surface. The submarine carries 12 hours worth of oxygen. How much time does the crew have to conducts experiments?
Mathematics
2 answers:
sukhopar [10]1 year ago
7 0

Answer:

Step-by-step explanation:

speed =65m/mins = 65/60 = 1.083m/s

Time taken to go down,

t = 4485/1.083

= 4141.37 s

Total time gotten = 12 hrs = 12*60*60

= 43200s

Amount of time left to conduct experiment

= 43200-4141.37

= 39058.63s

= 39058.63/3600

= 10.85 hrs

bekas [8.4K]1 year ago
3 0

Answer:

The crew have to conducts experiments FIVE times.

Step-by-step explanation:

The submarine descends 65 meters per minutes to a depth of 4485 m.

This means it takes it 4485/65 = 69 minutes to descend to that depth.

As it ascends at a rate of 65 meters per minute to the surface, it also takes it the same amount of time (69 minutes).

The submarine carries 12 hours, or 12x60 = 720 minutes, worth of oxygen.

To be safe back to the surface, the number of times for descending must be equal to that for ascending.

The total number of descending or ascending times = round [(720:69):2] = 5.

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The area of John’s rectangular lawn and cement border is 1222 square feet. If the cement border is 2 feet wide, and the length o
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The keyless entry system in some cars uses a 4-digit keypad. There are 10 possible digits, and the digits can be repeated. How m
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A red candle is 8 inches tall and burns at a rate of 7/10 inch per hour. A blue candle is 6 inches tall and burns at a rate of 1
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Answer:

The heights are the same after 4 hours.

Step-by-step explanation:

The red candle burns at a rate of 7/10 inches per hour. In t hours, (7/10)t inches have burned. The height of the candle after t hours is 8 - (7/10)t.

The blue candle burns at a rate of 1/5 inch per hour. In t hours, (1/5)t inches have burned. The height of the candle after t hours is 6 - (1/5)t.

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2 years ago
1. Kim works as a book keeper and creates invoices for a variety of companies. Help Kim find the total
Zanzabum

This is about calculation of invoice.

<u><em>1) Total for the invoice = $2641.25</em></u>

<u><em>2) Total for the invoice = $30</em></u>

<u><em>3) Total for the invoice = $1925</em></u>

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Amount for cameras = 12 × 200 = $2400

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Amount for 10 ft cables = 25 × 1.25 = $31.25

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Amount for 10 of these cables = 1.75 × 120 = $210

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For a customer that wants 15 yard;

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Thus;

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On wednesday; 2hours will cost; 2 × $275 = $550

Total for the invoice = 550 + 825 + 550 = $1925

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