Answer:
Step-by-step explanation:
The given notation is not clear enough, but I will asume that the question is: "Wich is the vector lenght of the vector in a 3 dimensional euclidean space"
Vector lenght of a vector is given by the next formula:
║║=
In this case we have a=2, b=3 and c=1. We should substitute these values in the formula given before to obtain:
║║=
Wich is the answer to the problem.
Answer:
they get 8.27$ back.
Step-by-step explanation:
Cost of lunch=$7.29+$8.45+$5.99
=$21.73
3 of them put $10 each=$10×3
$30
Total change they got back=$30-$21.73
=$8.27
Mark as a brainest answer ok
The board will be 75 inches long