3722 w
67%
The table shows the travelling time to work of 50 people.
Frequency
Travelling time (1)
in minutes
0 5
10 15
20 13
30 < t < 40
10
40 < t < 50
7
Calculate an estimate of the mean travelling time.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )

The answer is, the streetlight is 18 inches tall.