Arrange the following polynomial into descending order and identify the 3rd term.

18x + 2x3 - 3x2 + 10

18x

2x3

-3x2

10

In arranging the terms of this polynomial, take note of the exponents of the variables. The arrangement of this polynomial is,

2x³ - 3x² + 18x - 10

Thus, the third term of this polynomial should be 18x which is the first choice.