Question

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Answer 1

Answer: (1) A (2) C (3) B (4) D (5) E

Explanation:

Use the following conversions:

1 rev = 2π

1 hr = 60 min

1 min = 60 sec

1 mi = 5280 ft

`1)\qquad (40\ rev)/(min)* (2\pi)/(1\ rev)* (1\ min)/(60\ sec)=\large\boxed{(4\pi)/(3)}\longrightarrow A`

`2)\qquad (80\ rev)/(hr)* (1\ hr)/(60\ min)=\large\boxed{(4)/(3)}\longrightarrow C`

`3)\qquad (55\ mi)/(hr)* (5280\ ft)/(1\ mi)* (1\ hr)/(60\ min)* (1\ min)/(60\ sec)=\large\boxed{(242)/(3)}\longrightarrow B`

`4)\qquad (8\ rad)/(min)* (1\ rev)/(2\pi)=\large\boxed{(4)/(\pi)}\longrightarrow D`

`5)\qquad (240\ rev)/(hr)* (2\pi)/(1\ rev)* (1\ hr)/(60\ min)=\large\boxed{8\pi}\longrightarrow E`