The question is below

1385.622 cm^2

Step-by-step explanation:

The area of a circle is given by the formula

A = pi * r^2

We know the radius is 21 and pi is approximated by 3.142

A = 3.142 * 21^2

A = 3.142 *441

    1385.622 cm^2

So we know the area of a circle is πr^2, which means:

π * r^2.

π = pi

r = radius

So we know the values of π and r, so we can plug them in:

π * r^2

3.142 * 21^2

3.142 * 441 = 1385.622

Therefore, the area of the circle is 1385.622

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0