What is the value of b in the equation below? 9 Superscript negative 8 Baseline times 9 Superscript negative 2 Baseline = a Superscript b

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

It’s hard to understand what you put.. can you show a picture ?