# What is the cross product of (-300i + 200j - 150k) and (i + j -7k)?

$= - 1250 \hat{i} - 2250 \hat{j} - 500 \hat{k}$
$\left(- 300 \hat{i} + 200 \hat{j} - 150 \hat{k}\right) \times \left(\hat{i} + \hat{j} - 7 \hat{k}\right)$
=(200*(-7)-1*(-150))hati+((-150)*1-(-7)*(-300))hatj+((-300*1)-(1*200))hatk)
$= - 1250 \hat{i} - 2250 \hat{j} - 500 \hat{k}$