Four elements(A, B,C and D) required to produce a drug for ebola virus treatment are to be mixed in the ratio 1:2:4:5,if the information is to be represented on a pie chart, what percentage will element C have on the pie chart?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.