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ra1l [238]
3 years ago
12

Researchers studied the relationship between how long a person uses a computer before bed and how long a person sleeps each nigh

t. People were selected at random to participate in the study. The computer use of each participant was classified as minimal, moderate, or extreme. The relative frequency table below summarizes the results of this study. There were 17 people in the study who were both moderate computer users and got 5 to 7 hours of sleep. How many people in this study were both extreme computer users and got 5 to 7 hours of sleep?
Mathematics
1 answer:
Ostrovityanka [42]3 years ago
4 0

Answer:

Since moderate user got 5 to 7 hours of sleep, that means extreme users got less than 7 hours of sleep.

Hence no extreme user had 5 to 7 hours of sleep.

And mimimal users had greater than 7 hours of sleep.

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Sandra notices a fourth racer called the Whirlwind. Its poster says it covers 1232 yards in 180 seconds. She wants to compare th
Daniel [21]

Answer:

6.8yards/seconds

Step-by-step explanation:

Speed = Distance/Time

Given the following

Distance covered = 1232 yards

Time taken = 180 seconds

Substitute to get the speed

Speed  = 1232/180

Speed  = 6.84

Hence whirlwind's speed in yards per seconds to the nearest tenth is 6.8yards/seconds

4 0
3 years ago
Please show steps to answer. No links please
Lana71 [14]

Answer:

<em>18 hours after 10 AM</em>

Step-by-step explanation:

  1. We are looking for the time the helicopter and the plane will be the same distance from Burbank after 10 AM.
  2. We are given the two equations for the distance that the helicopter and the plane are away, in miles.
  3. It also says that R is the variable for time.
  4. Using this information, we need to solve for the time with broth equations, so we would set both up to be equal to each other, since they will be the same distance away from each other.
  5. It would look like this: -150r + 260 = -270r + 440.
  6. Add 150r to both sides.
  7. 260 = -10r + 440.
  8. Add -10r to both sides.
  9. Now we have 10r + 260 = 440
  10. Subtract 260 from both sides.
  11. 10r = 180
  12. Divide each side by 10 to isolate the R.
  13. R = 18.
  14. It would be 18 hours after 10 AM.

If I am incorrect in my reasoning, please let me know so that I can plan better for my future answers. Have an amazing day.

4 0
2 years ago
The table shows the package weights and prices of different types of snacks sold at the local supermarket. Which snacks cost the
damaskus [11]

Answer:

75p

Step-by-step explanation:

on edg

5 0
4 years ago
Use a ratio to compare the values. Simplify the ratio. 30 in. to 2 ft
galben [10]
2 ft = ? how many inches

12 in = 1 foot

12*2 = 24

24 inches, and 30 inches. 

30:24  Simplify

30/6 = 5
24/6 = 4

5:4

Answer: 5:4 is the simplest form
5 0
3 years ago
A)find mode:2,4,6,8,6,4,2,4,2,4,6,6,4<br>B)If A= {0,1,2,3,4} find n(A)​
Citrus2011 [14]
The answer for the question Mode and number of A is
4 0
3 years ago
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