When designing a questionnaire, the most important rule of all is to make sure that questions collect the right data in a form that can be used to further fact-finding. a. true
b. false

True. Questions should be collecting unbiased data that can be used in fact-finding. Having questions that are unrelated would not benefit the questionnaire. The questions within the questionnaire are one of the most important things. So, your answer would be A) true.

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.