You have to find the difference in height between both checkpoints. To do this just calculate 196 - 52. Checkpoint 5 is 144 (meters?) higher than Checkpoint 2.
Answer: 
Step-by-step explanation:
Given : A biologist studied how cells grow by adding liquid protein to cell samples.
She divided
of an ounce of liquid protein evenly among 3 cell samples.
Here , total quantity of liquid protein =
of an ounce
Total cell samples = 3
Now , Quantity of liquid protein given by her to each cell = (total quantity of liquid protein ) ÷ (3)
=
.
Hence, Quantity of liquid protein given by her to each cell = 
The answer would be 42 because its the same angle as the other one
I hope I helped! ♥