Answer:
Constant Speed of Arnie’s airplane = 5 mi/min
Constant Speed of Bernie’s biplane = 7 mi/min
Bernie's Biplane is faster.
Step-by-step explanation:
Arnie' Airplane speed can be determined by calculating the slope.
Also, [tex]\text{Constant Speed} = \frac{\text{Change in distance}}{\text{Change in time}}[/tex]
⇒ [tex]\text{Constant Speed} = \frac{\text{10}}{\text{2}}[/tex]
⇒ Constant Speed = 5 mi/min
For calculating Bernie's Biplane, The formula used is:
[tex]\text{Constant Speed} = \frac{\text{Total distance}}{\text{Total time taken}}[/tex]
⇒ [tex]\text{Constant Speed} = \frac{\text{21 +35+56}}{\text{3+5+8}}[/tex]
⇒ [tex]\text{Constant Speed} = \frac{\text{112}}{\text{16}}[/tex]
⇒ Constant Speed = 7 mi/min
Hence, Bernie's Biplane is faster.