There is a formula for that;
Total time = (Worker 1 * Worker 2) / (Worker 1 + Worker 2)
Total time = (80 * 120) / (80 + 120)
Total time = 9,600 / 200
Total time = 48 minutes
Answer:

Step-by-step explanation:
To find the volume of a prism, you must multiply its 
Step-by-step explanation:
You could add (-1.07 + 2.971) to get (1.901)
Then do (1.901 - 4.3) to get a negative number; (-2.399)
I would double check this all with a calculator