Well, estimate means to get like a general idea, or "in the ball park". The factors include; the trip which is $26, and the ammount of students in the class, which is 22. In order to estimate, you need to round. $26 rounded becomes $30. 22 rounded becomes 20. So now that we have the rounded numbers, we solve the problem. In order to find the total cost for all the students, we multiply the amount of students, by the ammount of money it costs per student. The estimated version of this is: 20x30=600 This means that the estimated answer is $600 total. Now do the same thing with the actual numbers. 22x26=572. This means that the actual answer is $572. The roumded total Answer is $600. You can say it is better use the actual numbers, and not estimate, because it is the actual answer. I hope this helps you, im sorry for the long answer :)
With polynomials the degree is the highest power x or whatever the variable is raised to. In this case, the degree is 3 since the highest power x is raised to is x^3
