Which number is the best estimate of 866,214,000,000

This question is Incomplete because it lacks the appropriate options

Complete Question

Which number is the best estimate of 866,214,000,000 using powers of 10

a) 9 × 10¹¹

b) 8 × 10¹¹

c) 10 × 11¹⁰

d) 8 × 10-¹¹

a) 9 × 10¹¹

Step-by-step explanation:

When we want to estimate a number using the power of 10, we are trying to write the number in a standard form.

We are to estimate :866,214,000,000 using powers of 10

Hence,

8.66214000000 × 10¹¹

We round up to the nearest whole number

= 9 × 10¹¹

Therefore, the best estimate for 866,214,000,000 using powers of 10

= 9 × 10¹¹