40 points , answer and explain, . you!
which expression is arranged by decreasing powers of x for the given polynomial? 6x^2 - 2x^4+4+3x

a. -2x^4+3x+6x^2+4

b.6x^2+4+3x-2x^4

c. -2x^4+6x^2+3x+4

d.4+3x+6x^2-2x^4

Step-by-step explanation:

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !