Question

an astronomical unit (au) is equal to the average distance from the sun to earth. answer parts a and b.
a. an astronomical unit is about 92,955,807 miles. use a single digit times a power of ten to estimate this value to the nearest ten million miles.
× 10 miles
(type whole numbers.)

Explanation:

Step1: Identify the ten - million place

The number 92,955,807 has 9 in the ten - million place.

Step2: Round to the nearest ten - million

Since the digit in the million place (2) is less than 5, we round down. So, 92,955,807 rounds to 90,000,000.

Step3: Write in scientific notation

90,000,000 can be written as $9\times10^{7}$.

Answer:

9, 7