**Answer:**

$4,000,000

**Step-by-step explanation:**

20,000*200=4,000,000

**Answer:**

5/21

**Step-by-step explanation:**

300 mm = 0.3 meter because 1 meter = 1000 mm so 3 meters would be 3000 mm but 300 mm is 1/10 of 3000, so 300 mm would equal 0.3

1.Solve for x: 4 over x plus 4 over quantity x squared minus 9 equals 3 over quantity x minus 3.

<span>(4/x) + [4/(x^2 - 9)] = 3/(x - 3) </span>

<span>LCD: x(x + 3)(x - 3) </span>

<span>4(x + 3)(x - 3) + 4x = 3(x)(x + 3) </span>

<span>4(x^2 - 9) + 4x = 3x^2 + 9x </span>

<span>4x^2 - 36 + 4x = 3x^2 + 9x </span>

<span>x^2 - 5x - 36 = 0 </span>

<span>(x - 9)(x + 4) = 0 </span>

<span>x = 9 or x = - 4 </span>