The walnut middle school cafeteria staff wants to know which types of pizza to serve. The staff surveys every 5th student that walks into the cafeteria about their pizza preference. Identify the sample as biased or unbiased and describe its type

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

the answer is d

step-by-step explanation: