Question

question 7
10 pts
every day, over 800 ______ gallons of water flow through the grand canyon.
○ thousand
○ million
○ billion
○ decibals

Explanation:

To determine the correct unit, we analyze the context of water flow through the Grand Canyon. "Decibals" (a misspelling of decibels, a unit for sound) is irrelevant. The Grand Canyon has a large water flow, so "thousand" is too small. "Billion" is overly large for daily flow. "Million" is a reasonable estimate for the daily water flow volume through the Grand Canyon.

Answer:

B. million