What does a mechanical engineer do?

Ben is interested in using a source that provides original research, current and developing trends and experts within specific fields. which source should he use?

Aconstruction crew was made up of 88 men and the rest women. if 40% of the crew were men, how many people were in the crew?

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.