Question

Choose the polynomial written in standard form.

xy2 + 4x4y + 10x2
x4y2 + 4x3y + 10x
x4y2 + 4x3y5 + 10x2
x6y2 + 4x3y8 + 10x

Answer 1

find the one where all the powers are descending

Answer 2

..what does that mean?

Answer 3

ascending powers: When the exponential terms of an algebraic expression are arranged from lowest to highest, as determined by the exponents of a particular variable in each term, the expression is said to be written in ascending powers of that particular variable.

descending powers: When the exponential terms of an algebraic expression are arranged from highest to lowest, as determined by the exponents of a particular variable in each term, the expression is said to be written in descending powers of that particular variable.

x^4y^2 + 4x^3y + 10x^2

Answer 4

That's not an option.
These are the exact options: http://prntscr.com/6ni9i0
That was my problem with the previous OS answer; the exponents for the answer they gave didn't match exactly with any of the options.