Given: In circle O, m BAC = 290. So angle COB = 70 and angle CAB = 35
So angle COB = 70 and angle CAB = 140
So angle AOB = 70 and angle CAB = 120
O O
O So angle AOB = 120 and angle COB = 60

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.

Yea they are simplyfiy the ratios