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Answer:
a b and c
Step-by-step explanation:
Answer:
31. (a) The height decreases by 12 feet each second towards the first floor
(b)
- After 3 seconds, the elevator is 144 feet above the first floor
- After 6 seconds, the elevator is 108 feet above the first floor
- After 9 seconds, the elevator is 72 feet above the first floor
(c) It takes 15 seconds for the elevator to get to the first floor
(d) The basement floor is 48 feet below the first floor
Step-by-step explanation:
<u>31 (a) explanation:</u>
An elevator is 180 feet above the first floor.
Each second, it descends 12 feet.
So the elevator's change in height each second is a decrease of 12 feet towards the first floor.
<u>31 (b) explanation:</u>
If the elevator goes down 12 feet, towards the first floor, in 1 second then;
- After 3 seconds it will be 180 feet - 3(12) feet = 144 feet above the first floor
- After 6 seconds it will be 180 feet - 6(12) feet = 108 feet above the first floor
- After 9 seconds it will be 180 feet - 9(12) feet = 72 feet above the first floor
<u>31 (c) explanation:</u>
If the elevator is 180 feet above the first floor and it takes 1 second to descend 12 feet,
Then it will take: × 1 second = 15 seconds reach the first floor.
<u>31 (d) explanation:</u>
From the first floor it takes 4 seconds to reach the basement floor
Therefore the basement floor is × 12 feet = 48 feet below the first floor
Answer:
A) Mean = 1.0295
Median = 1.006
B) the largest sample Observation can be reduced to 1.3735
Step-by-step explanation:
A) I) The mean Value is the addition of all the values, then dividing by the number of values occured.
0.736 + 0.863 + 0.865 + 0.913 + 0.915 + 0.937 + 0.983 + 1.001 + 1.011 + 1.064 + 1.109 + 1.132 + 1.140 + 1.153 + 1.253 + 1.397 = 16.472
16.472 ÷ 16 = 1.0295
1.0295 is the mean value
II) The median value is the value at the center of the point. We have two values at the middle point.
(1.001 + 1.011) ÷ 2 = 1.006
1.006 is the median value.
Therefore the mean value which shows the actual middle value of the numbers if the numbers where evenly distributed is greater than the median value which show middle value of the numbers in the result.
The difference between them is
1.0295 - 1.006 = 0.0235
B) The largest sample Observation is 1.397. it can be decrease by subtracting the difference between the mean and median from the number.
Wherefore; the difference between mean and median is 0.0235
Therefore;
1.397 - 0.0235 = 1.3735
If the largest sample Observation is reduced to 1.3735, the median value will not be affected.
Answer: The first answer should be correct.
Step-by-step explanation: It is asking to find the number of equal-sized parts. Equal-sized means the number has to be split. I hope this clears up your problem! :P