The survey in the previous question was conducted by calling land-line telephones, and those conducting the survey are concerned about the possibility of under coverage, since some people do not own a phone or own only a cell phone. Which of the following is the best way for them to correct for this source of bias? a. Use a lower confidence level, such as 80%.
b. Use a higher confidence level, such as 99%.
c. Take a larger sample.
d. Use a t-interval instead of a z-interval.
e. Throw this sample out and start over again with a better sampling method.

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

the answer is (-4,-4)

hope this ! : d

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.