Michael has a science project due. He knew that it would take him 4 hours to complete the project. He needed to spend 50% of his time on his experiment, 40% of his time on his analysis, and 10% on putting his project together.
What is the ratio of time spent putting his project together to the time he spent on the experiment?
A. 2:5
B. 1:9
C. 3:4
D. 1:5