Answer:
It should be B
Step-by-step explanation:
I hope this helps
Answer:
Part 1)
Projection of vector A on vector B equals 19 units
Part 2)
Projection of vector B' on vector A' equals 35 units
Step-by-step explanation:
For 2 vectors A and B the projection of A on B is given by the vector dot product of vector A and B
Given

Similarly vector B is written as

Thus the vector dot product of the 2 vectors is obtained as

Part 2)
Given vector A' as

Similarly vector B' is written as

Thus the vector dot product of the 2 vectors is obtained as

Try this solution, note, the shown way is not the shortest one.
The answer is marked with red colour.
Answer: 6
Step-by-step explanation:
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