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DerKrebs [107]
2 years ago
15

In experiments where participants were allowed to sleep for an unlimited amount of time, participants tended to sleep 12 or more

hours a day for the first few days and then settled into 7.5 to 9 hours of sleep a day. The extra-long sleep time of the first few days suggests that participants began these experiments with ______.
Mathematics
1 answer:
Butoxors [25]2 years ago
7 0

Answer:

Sleep debt

Step-by-step explanation:

Also called sleep deficit, sleep debt can be likened to a deficit in the bank such as a loan that must be repaid. The deficit accumulates and will have to balanced or there would be mental or psychological effect on the affected person. Research by The national sleep foundation requires Americans to sleep at least 7.1 hours per day.

There two types of sleep deprivation or sleep deficit: partial sleep deprivation and total sleep deprivation. In Partial sleep deprivation, the person may not get enough sleep per day example not up to 7.1 hours per day. Total sleep deprivation means that the affected person does not sleep for up 24 hours ie a full day.

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2. Find the compound interest on Rs.25, 000 after 2 years compounded
Allushta [10]

Answer:25,000 in 2 years at annual compound interest, if the rates for the successive years be 4% and 5% per annum respectively is: (1) Rs. 30,000 (2) Rs. 26,800 fa) Rs.

A=P[1+  

100

r

​  

]  

n

 

⇒  A=Rs.25,000×(  

100

106

​  

)  

3

 

⇒  25,000×  

50

53

​  

×  

50

53

​  

×  

50

53

​  

 

⇒  A=Rs.29,775.40

⇒  CI=A−P

⇒  Rs.29,775.40−Rs.25,000

∴   CompoundInterest=Rs.4775.40.

6 0
3 years ago
A submarine cruises underwater at 20 km/h and on
Darina [25.2K]

Answer:

System of equations:

20x + 30y = 650

x + y = 25

Time underwater = 10 hours

Time at the surface = 15 hours

Step-by-step explanation:

Let x = time underwater at 20 km/h.

Let y = time on the surface at 30 km/h.

speed = distance/time

distance = speed * time

distance underwater: 20x

distance on the surface: 30y

total distance: 650

20x + 30y = 650

total time: x + y

total time: 25

x + y = 25

20x + 30y = 650

x + y = 25

20x + 30y = 650

-20x - 20y = -500

--------------------------------

          10y = 150

              y = 15

x + y = 25

x + 15 = 25

x = 10

4 0
3 years ago
What figure has 2 sets of parallel lines and no right angles
grandymaker [24]
Rhombus or diamond, but not a square or rectangle
5 0
2 years ago
Read 2 more answers
What is 90times345 need it now
Ivanshal [37]
90*345=
31050
Hope i helped.
6 0
3 years ago
Read 2 more answers
The sum of three consecutive even numbers is 582. What is the 1st number?
Snezhnost [94]

Answer:

d

Step-by-step explanation:

y

4 0
3 years ago
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