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mart [117]
3 years ago
7

How many hours are in 170 minutes

Mathematics
1 answer:
enyata [817]3 years ago
8 0

Answer:

There are a total of 2 hours and 50 min.

Step-by-step explanation:

1 hour = 60 min

60 x 2 = 120 min

60 x 3 = 180 min - too much

so take away 10 from 180 min to get 170

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Plutonium-240 decays according to the function where Q represents the quantity remaining after t years and k is the decay consta
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Note: a radioactive decay constant is always negative.

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time = ln (20 / 24) / -.00011
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time = <span> <span> <span> 165.7468698455 </span> </span> </span>
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</span></span></span>

7 0
3 years ago
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Fill in two equal numbers that add to the even number 38
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19 + 19 = 38 <======
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A raft and a motorboat simultaneously leave from the same point and move down the river. After 2 hours the motorboat turns aroun
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Answer:

2 hours

Step-by-step explanation:

Let x mph be the speed of motorboat in still water and y mph be the speed of current.

A raft and a motorboat simultaneously leave from the same point and move down the river, then speeds down the river are:

        motorboat =  x + y mph

        raft = y mph

In two hours they will cover:

        motorboat = 2(x+y) miles

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After 2 hours the motorboat turns around and starts moving towards the raft (against the current), so its speed is now x - y mph.

Let t be the time they move towards each other. In t hours, they cover

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The distance from the starting point to the turning point is the same as the sum of the distances the raft covers and the motorboat covers after turning around, so

2(x+y)=2y+t(x-y)+ty \\ \\2x+2y=2y+tx-ty+ty\\ \\2x=tx\\ \\t=2\ hours

6 0
3 years ago
A population has a mean µ = 6 and ∑x = 48. How many scores are in the population?
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Answer:

8

Step-by-step explanation:

Recall the formula for the population mean of a data set:

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Divide both sides by 48:

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Reciprocal of both sides:

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Thus, there are 8 scores in the population size.

And we're done!

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3 years ago
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