Commute times in the u. s. are heavily skewed to the right. we select a random sample of 200 people from the 2000 u. s. census who reported a non-zero commute time. in this sample the mean commute time is 27.5 minutes with a standard deviation of 18.9 minutes. can we conclude from this data that the mean commute time in the u. s. is less than half an hour? conduct a hypothesis test at the 5% level of significance. what is the p -value for this hypothesis test? your answer should be rounded to 4 decimal places.

d

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

the answer would be  

a.

3: 1

step-by-step explanation:

the answer is  

a.

28 ft2

step-by-step explanation: