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OpenStudy (anonymous):
Find a • b. a = 4i + 8j, b = -2i + 3j <2, 11> 32 <-8, 24> 16
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jimthompson5910 (jim_thompson5910):
Hint: If v = a*i + b*j and w = c*i + d*j then v dot w = a*c + b*d
OpenStudy (anonymous):
ok onesec let me calculate
OpenStudy (anonymous):
so its 16
jimthompson5910 (jim_thompson5910):
16 is correct
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