I don’t understand the question sorry
Answer:
Part A: A control group would add in a datapoint that didn't receive any medicine, letting you know if the medicines actually work.
Part B: Split evenly. This makes sure you have enough data for each group.
Part C: By breed. Which sanctuary they come from wouldn't seriously impact their anatomy like which breed they are would.
Answer:
hope it helps and u understand
check the steps in picture attached
arc length = radius multiplied by angle in radians
radius = 7 angle = 90 degrees
90 degrees = 1.571 radians
7 × 1.571 = 10.997
AB is 10.997 or 11 inches long