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nasty-shy [4]
2 years ago
8

The table shows the travelling time to work for 50 people. Calculate an estimate of the mean travelling time.

Mathematics
1 answer:
Nutka1998 [239]2 years ago
5 0

Answer:

24.8 mins

Step-by-step explanation:

We'll begin by generating a table indicating the time mark (mid time) for the 50 people.

This is illustrated below

Time > timemark > frequency

0 – 10 > 10/2 = 5 > 5

10 – 20 > (10+20)/2 = 15 > 15

20 – 30 > (20+30)/2 = 25 > 13

30 – 40 > (30+40)/2 = 35 > 10

40 – 50 > (40+50)/2 = 45 > 7

The mean time for the 50 people is given by:

Mean = summation (mid time x frequency) / total frequency

Mean = [5x5 + 15x15 + 25x13 + 35x10 + 45x7] / 50

Mean = [25 + 225 + 325 + 350 + 315] / 50

Mean = 1240 / 50

Mean = 24.8 mins

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Let f(x) = x^2 + 6x.
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Answer:

(A) The slope of secant line is 18.

(B) The slope of secant line is h+16.

Step-by-step explanation:

(A)

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The secant line joining (3,27) and (9,135). So, the slope of secant line is

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(B)

The given function is

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The secant line joining (5,55) and (5+h,h^2 + 16 h + 55). So, the slope of secant line is

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m=\dfrac{h^2 + 16 h }{h}

m=h+16

The slope of secant line is h+16.

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