Write the number in standard form.

1.66×10^9

  1,660,000,000

Step-by-step explanation:

The exponent of 9 means the mantissa is multiplied by 10^9 = 1,000,000,000.

To put the number in standard form, carry out that multiplication:

  1.66×10^9 = 1.66×1,000,000,000 = 1,660,000,000

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.