Solution 7.3d
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(New page: If the boat is due east of the rock this means the boat must have the same <math>\mathbf{j}</math> term as the rock. <math>4t-12=352</math> giving <math>t=91\ \text{s}</math>)
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If the boat is due east of the rock this means the boat must have the same \displaystyle \mathbf{j} term as the rock.
\displaystyle 4t-12=352
giving
\displaystyle t=91\ \text{s}
