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

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.