What is the prepositional phrase in the following sentence? mr. harding asked joe to pour the solution into the beaker.

I believe it is " into the beaker."

Explanation:

A prepositional phrase is a modifying phrase consisting of a preposition and it's object.

A Few Examples:

In the beginning

Before the fall

At school

Behind the scenes

Under the couch

Toward the door

With anger

Without a paddle

Over the rainbow

I hope this helped you : )

they insisted that there was not enough time to learn everything.  

explanation:

if they were going to steal the answers that is simply because they insisted that there was not enough time to learn everything.