Posted by Sarah on Friday, June 15, 2012 at 12:18am.
Determine the value of k, so that u = [3,7] and v = [16,k] are perpendicular.

Calculus  broday, Friday, June 15, 2012 at 12:52am
they're parallel

Calculus  Sarah, Friday, June 15, 2012 at 1:06am
it says determine the value of k so that u and v ARE perpendicular .... if it was parallel, i don't think it would ask me to find k....... unless it's a trick question ...

Calculus  Damon, Friday, June 15, 2012 at 2:43am
slope of u = 7/3
so slope of perpendicular to u = +3/7
so
3/7 = k/16
7 k = 48
k = 48/7

Calculus  Reiny, Friday, June 15, 2012 at 7:52am
or...
their dot product must be zero
(3)(16) + 7k = 0
7k = 48
k = 48/7

Calculus  Henry, Monday, June 18, 2012 at 6:05pm
thank you everyone
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