Take the cross product, then normalize the result.

This has norm

and so a unit vector orthogonal to both given vectors is

An equally correct answer would be the negative of this vector, since

.
Answer:
No entiendo por qué está en ingles
There would be 65 doses in a 13 ounce bottle.
Answer:
she'll use in total 1/5 + 3/5 = 4/5 from her 16 pounds of peanuts so 4/5 * 16 = 12.8
Not entirely sure about my answer