Answer:
if give brainliest i will answer
Step-by-step explanation:
Answer:
?
Step-by-step explanation:
theres nothing there
Answer:
Mean height of 159
Step-by-step explanation:
Add 153 and 165, then divide by 2 to find the average of 159.
b = 3
Step-by-step explanation:

Add similar terms :

Collect like terms and simplify

Answer:
40 seconds
Step-by-step explanation:
The ratio would be 3:120, indicating the amount of times it went up for air in 120 seconds. In order to find the answer, we'll find the unit rate. 120 divided by 3 is evenly 40. That means, the unit rate is 1:40. It also means that 40 seconds went by before the manatee surfaced the first time (if it held its breath for the same rate).