Answer:
-1/7
Step-by-step explanation:
m=y2-y1/x2-x1
m=4-5/2--5=-1/7
m=-1/7
The ship is 394.73 fr far from the base of the lighthouse.
According to the given question.
Angle of depression from the top of the light house is 21 degrees.
Let ∠ABC represents the angle of depression. And BC be the distance of ship from the base of light house.
Now in triangle ABC we have
tan 21 = AC/BC
⇒ 0.38 = 150/BC
⇒BC = 150/0.38
⇒ BC = 394.73ft
Hence, the ship is 394.73 fr far from the base of the lighthouse.
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Answer:
(a) Mean = 36.05; (b) median = 37; (c) mode = 37
Step-by-step explanation:
I am assuming your DFT is like this:
(a) Mean
The mean is the sum of all the data points divided by the number of points. I have done some of the calculations for you in the table below
(b) Median
The median is the middle value in your list of observations.
Your data set contains 19 terms, so the middle is (19/2)th term.
Count down the column of cumulative frequency (cf) until cf = 9½.
The 9½th term is 37.
Median = 37
(c) Mode
The mode is the value that appears most often in your list of observations.
It is obvious from your table that the number that occurs most frequently is 37.
Mode = 37
The diagram below shows that the score of 37 is predominant.