The height of a tree trunk is 20 meters and the base diameter is 0.5 meter.
a. the wood has a density of 380 kilograms per cubic meter. find the mass of the trunk to the nearest kilogram.

the mass of the tree trunk is about kilograms.

question 2 b. the trunk puts on a growth ring of 4 millimeters and its height increases by 0.2 meter this year. how many cubic meters of wood does the tree trunk produce? round your answer to the nearest hundredth.

the tree trunk produces about cubic meters of wood this year.

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

If you answer 2+2 you will get over 80 points