A rectangle has an area of 273.48 square kilometers and a base of 15.9 kilometers. What is the height?

The height is 17.2 milometers.

Step-by-step explanation:

l*w=A

273.48=15.9*h

1/15.9*273.48=15.9*1/15.9*h

17.2=h

17.2 kilometers

Step-by-step explanation:

A=w*l or b*h

So to find the height you divide the total of 273.48 and divide it by the base of 15.9.

273.48÷15.9=17.2

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

option: d is correct

step-by-step explanation: