How was annabeth able to get percy grover and herself past cerberus?

I believe the answer is: She made friends with the creature by throwing him a red rubber ball.

Despite its scary features, Cerberus is basically a pet dog that is told to guard the gate. (even though the gate that it protects is the gate of hell rather than the gate of normal household).
So annabeth instinctively think that Cerberus must be bored since He got no friend and attention in that place and play fetch with the ball that she stole from the Waterworld gift store.

Yes, they are always very triggered

Early 18th century british industries were generally small scale and relatively unsophisticated. most textile production, for example, was centred on small workshops or in the homes of spinners, weavers and dyers: a literal ‘cottage industry’ that involved thousands of individual manufacturers. such small-scale production was also a feature of most other industries, with different regions specialising in different products: metal production in the midlands, for example, and coal mining in the north-east.two illustrations of 18t