Create a study that requires a survey. In your answer, explain why a survey instead of a census is needed and describe the survey.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Ineed to know the answer to this algebra question.

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these