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3 years ago

Scott trained for the marathon.

Mathematics

1 answer:

slamgirl [31]3 years ago

6 0

Answer:

See below

Step-by-step explanation:

Day 1

70 min for 10 km
Rate = 70/10 = 7 min/km

Day 10

2h40 min for 20 km
2*60+40 = 160 min for 20 km
Rate = 160/20 = 8 min/km

Day 20

4 h 15 min for 30 km
4*60 + 15 = 255 min for 30 km
Rate = 255/30 = 8.5 min / km

From the rate change we see:

1 min increase when the distance increases from 10 km to 20 km
0.5 min increase when distance increases from 20 km to 30 km

So we see 1 min increase per twice the distance increase

With the same rate increase we can expect 1 min increase from 20 km to 40 km, which gives us the rate of 9 min/km
With same logic we get 9.055 km/min rate for 44 km distance

Total time it takes:

9.055*44 = 398.42 min = 398.42*1/60 min = 6 h and 38.42 min

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Answer:

The expected number of men in the delegation is 0.86.

Step-by-step explanation:

Number of men = 3

Number of women = 4

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The expected number of men in the delegation is

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3 years ago

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Answer:

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Step-by-step explanation:

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Answer:

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3 years ago

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