Answer:
see explanation
Step-by-step explanation:
The first figure is a parallelogram with area (A) calculate as
A = bh ( b is the base and h the perpendicular height )
Here A = 144, b = 16 and h = x, thus
144 = 16x ( divide both sides by 16 )
x = 9
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The second figure is a trapezium with area (A ) calculated as
A = h (a + b)
where h is the height and a, b the parallel bases
Here A = 480, h = x, a = 37 and b = 27, thus
480 = x (37 + 27) = x × 64 = 32x ( divide both sides by 32 )
x = 15
The modal class is 70 - 80 and the mean speed is 66.4
<h3>How to determine the modal class?</h3>
The table of values is given as:
Speed Frequency
40 - 50 10
50 - 60 16
60 - 70 19
70 - 80 23
80 - 90 12
The modal class is the class with the highest frequency
The class 70 - 80 has the highest frequency of 23
Hence, the modal class is 70 - 80
<h3>How to determine the mean?</h3>
Rewrite the frequency table to include the class midpoints
x f
45 10
55 16
65 19
75 23
85 12
The estimate of the mean speed is then calculated as:
So, we have:
Evaluate
Hence, the mean speed is 66.4
Read more about mean and mode at:
brainly.com/question/14532771
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Answer:
The area is 7986m^2
Step-by-step explanation:
But the real thing u would say is the area is 7986.<3
Answer: 297 i believe i am a little rusty at this