Answer:
the following studies may fail to yield the desired information because
(a) i. some of the students might have died before 2015.
ii. Some people might lie based on the questionnaire sent.
So based on the two factors above the desired information might be altered or incorrect.
(b) i. individuals may be unwilling to provide accurate answers during the survey.
Step-by-step explanation:
Information may be altered when individuals are asked about their income or spending in other to show off to friends or the person asking the questions.
A because radius is half of the diameter
Answer:
Option A. 
Step-by-step explanation:
we know that
In the right triangle MNL
Applying the Pythagoras Theorem
substitute the values
4x-3 is the answer. Hope this helps:)
