Consider the circle. geometry

  (a)  47°

Step-by-step explanation:

Inscribed angle ACE is half the measure of arc AE, so is 42°/2 = 21°. Angle ECD subtends the same arc as angle EBD, so has the same measure, 26°. Angle ACD is the sum of the angles that make it up:

  ∠ACD = ∠ACE +∠ECD

  ∠ACD = 21° +26° = 47°

the data of the detroit pistons in numerical order from least to greatest is 0.30, 0.37, 0.55, 0.62, 0.69, 0.72, 0.73, 0.75, 0.77, 0.78, 0.80, 0.81, 0.81, 0.83, 0.84, 0.89

the data of the miami heat in numerical order from least to greatest is 0.50, 0.50, 0.56, 0.57, 0.67, 0.72, 0.72, 0.72, 0.75, 0.75, 0.76, 0.81, 0.82, 0.90, 1.00, 1.00

the detroit pistons median : 1.52

the miami heat median: 1.47

the iqr of this data is 0.05